It was probably Joseph Smith, Sr. that said that. You know how parents like to brag about their kids

I did not find a quote, but is seems plausible, because he had a good memory, he was familiar with the Bible and he even made a translation of the Bible. 1) "Although Smith never joined a church during his youth, he did read the Bible and was also influenced by the folk religion of that time and place." "From the early 1830s came the Book of Moses (which included a long passage about the biblical Enoch) as well as an attempt to revise the Bible." Source and further information: http://en.wikipedia.org/wiki/Joseph_Smith,_Jr. 2) "The Joseph Smith Translation of the Bible (JST), also called the Inspired Version of the Bible (I.V.), is a version of the Bible dictated by Joseph Smith, Jr., the founder of the Latter Day Saint movement. Smith considered this work to be "a branch of his calling" as a prophet. The work is the King James Version of the Bible (KJV) with some significant additions, clarifications, and revisions. It is a sacred text and is part of the canon of the Community of Christ, formerly the Reorganized Church of Jesus Christ of Latter Day Saints (RLDS), and other Latter Day Saint churches, but the majority of it is not a canonical text in The Church of Jesus Christ of Latter-day Saints (LDS Church)." Source and further information: http://en.wikipedia.org/wiki/Joseph_Smith_Translation_of_the_Bible 3) About Joseph Smith's memory: "Actually these little errors are quite important in their own way, for they show quite clearly that Joseph didn't go over his story to check it for "holes," as a clever deceiver would have to do. He simply relied upon his memory and told it as he recalled it, and so made just the sorts of little mistakes in detail that all authentic reminiscences contain." Source and further information: http://farms.byu.edu/publications/review/?vol=11&num=1&id=310 4) "Thus, if Joseph Smith's scriptural productions borrow material from the Bible he was known to study, this is entirely consistent with other cases of automatic writing. This phenomenon of memory, known as cryptomnesia, may also explain the presence of writing styles and literary patterns which are found both in the Book of Mormon and the Bible.95" Source and further information: http://www.mormonapologetics.org/lofiversion/index.php/t18840.html "Cryptomnesia, or inadvertent plagiarism, is a memory bias whereby a person falsely recalls generating a thought, an idea, a song, or a joke, when the thought was actually generated by someone else[1]. In these cases, the person is not deliberately engaging in plagiarism, but is rather experiencing a memory as if it were a new inspiration." Source and further information: http://en.wikipedia.org/wiki/Cryptomnesia

The first part is apparently true as evidenced by Joseph Smith, Jr's large library collected over a number of years: Books Owned by Joseph Smith The following is a list of books that were evidently owned by Joseph Smith. New York Period DeWolf and Brown, First Lines in Arithmetic, for the Use of Young Scholars. Hartford [Connecticut]: Printed and Published by William S. Marsh, 1818. Location: Wilford C. Wood Collection, Wilford C. Wood Museum, Bountiful Utah Name in book: Joseph Smiths Book January 31st 1818 Newlots The name of Catherine, sister of Joseph Smith, is on an inside flyleaf Mentioned in John Henry Evans, Joseph Smith, An American Prophet (New York: Macmillan, 1933), 437. Note: According to Evans the First Lines in Arithmetic; also English Reader and Gospel Sonnets (see below) were given by Joseph Smith to a 15 year old boy named Richard Bush in Nauvoo, Illinois. It is not certain if the year that Bush obtained this book was in 1841. His date of birth is given variously as 12 March 1820 and 13 March 1826. Whether 1841 is the correct year of the arrival of Richard Bush is not known. Pages from these books are reproduced in Wilford C. Wood, Joseph Smith Begins His Work, Vol. 2. Salt Lake City: Deseret News Publishing Co., 1962; middle section. The Holy Bible, Containing the Old and New Testaments: Together with the Apocrypha: Translated out of the original tongues, and with the former translations diligently compared and revised. With Canne's Marginal Notes and References. Cooperstown, (N.Y.) Stereotyped, Printed and Published by H. & E. Phinney . . . 1828 [King James Version, with revisions of 1769] Location: RLDS archives Flyleaf: The Book of the Jews And the property of Joseph Smith Junior and Oliver Cowdery Bought October the 8th 1829 at Egbert B Grandins Book Store Palmyra Wayne County New York Bottom of flyleaf: Price $3.75 Holiness to the Lord Joseph Smith's name appears in the Bible. facing page 24: Joseph Smith Jr. and Oliver Cowd[e]ry Book Esther: Joseph Smith Jr page 683: Joseph Smith Jr facing page 657: Joseph Smith Jr This Bible was purchased by Oliver Cowdery on 8 October 1829 since Joseph Smith, Jr. was not at Palmyra at the time but arrived at his home in Harmony, Pennsylvania on 4 October 1829. Grandin published the Book of Mormon in 1830. It was used for Joseph Smith's correction of the Bible as markings were made corresponding to his manuscript revisions. Joseph Smith did not know Hebrew or Greek during the time he made the majority of the corrections to the Bible. At first the full text was written out (for part of Genesis, all of Matthew, Mark and Luke) and then notations. Markings were made in the printed Bible that correspond to the short manuscript notations. Italic words that are crossed out in the Bible represent changes or deletions to be made. Original manuscripts of Bible corrections in RLDS archives. "Family Record" under "Marriages" has: Joseph Smith Junr Emma Hale was married Jan 18 1827 Bainbridge, Chenango County State of New York "The Phinney's [Henry and Elihu] imported all sorts of books from New York and Philadelphia and distributed them with their own publications through towns and villages from large wagons with moveable tops and counters, even providing a canal boat book store on the Erie Canal" (Margaret T. Hills, ed., The English Bible in America: A Bibliography of Editions of the Bible & the New Testament Published in America 1777 - 1957 [New York: American Bible Society and The New York Public Library, 1961], 69). Ohio Period Horne, Thomas Hartwell. An Introduction to the Critical Study and Knowledge of the Holy Scriptures, from the 4th corrected edition, illustrated with numerous maps and fac-similes of Biblical Manuscripts. Philadelphia: E. Littell, 1825. 4 vols. Location: RLDS archives J D Hughes Joseph Smith Jun. Kirtland O. Jan - 1834 Note: Vols. 2-4 only contain Joseph Smith's signature Frederick Madison Smith book plate Stuart, Moses. A Grammar of the Hebrew Language. 5th edition, corrected and enlarged. Andover, Gould & Newman, publishers and printers, 1835. 271pp.[Fold out materials in back of the book] Location: RLDS archives Flyleaf: Joseph Smith Juns Book Bot. Nov. 20th 1835 D. H. Smith Frederick Madison Smith book plate Lamoni[,] Iowa[,] Aug. 31, 1895 Note: Joseph Smith along with other church elders took Hebrew lessons from Joshua Seixas in 1836. A certificate attesting to Smith's knowledge of Hebrew was signed by J[oshua]. Seixas on 30 March 1836. (LDS archives) Augustus Hahn, Biblia Hebraica, Lipsiae, Sumptibus Et Typis Caroli Tauchnitz, 1833. Printed in Hebrew. Location: RLDS archives Flyleaf: Joseph Smith jr Book The signature of D.H. Smith appears in the front cover. Two scraps of paper were inserted in the book. Joseph's name is written on the back an inserted sheet titled, "Additional Observations for Discovering the Root": Joseph Smith Jr Lamoni Church Library Nov 24 - 1922 Other books owned Smiley, Thomas T. Sacred Geography or a Description of the Places Mentioned in the Old and New Testament, intended to Promote a Knowledge of the Holy Scriptures, accompanied by three maps . . . adapted to the use of schools and Private Families. Philadelphia, Printed for the author by W.P. Bason. Charleston, South Carolina, 1824. 12pp. [Maps: Map of the East as mentioned by Moses; Canaan, Palestine or the Holy Land; Countries mentioned in the New Testament] Location: RLDS archives Joseph Smith Jr M J Whitehead Robbins, Royal. The World Displayed in its History and Geography, Embracing a History of the World, from the Creation to the Present Day, with General View of the Politics, Religion, Military and Naval Affairs, Arts, Literature, Manners, Customs and Society of Ancient as well as Modern Nations, to which is added, An Outline of Modern Geography. (2 vols. in 1, New York, W.W. Reed, 1832. 408pp. Location: RLDS archives name of Z. Coltrin is crossed out Joseph Smith Jr Book inside back cover: Cowdery Cowdery Book said to be owned by Joseph Smith James Gray, Mediatorial Reign of the Son of God (Baltimore, 1821) Former location: RLDS archives Mentioned by Fawn M. Brodie, No Man Knows My History: The Life of Joseph Smith (New York: Alfred A. Knopf, 1945), 111. Brodie may have mistaken this book for the one that was owned by Samuel Harrison Smith. See below. Possible books owned by Joseph Smith The English Reader [Title page missing] n.d. 224pp. Location: RLDS archives Harret Smith Joseph Smith {Sr./Jr.?] Harverhill N Y [?] Samuel Note: This may not be our Joseph Smith family. The English Reader Location: Wilford C. Wood Collection Mentioned in John Henry Evans, Joseph Smith An American Prophet, 437. Gospel Sonnets or Spiritual Songs Location: Wilford C. Wood Collection Mentioned in John Henry Evans, Joseph Smith An American Prophet, 437. Books owned by other members of the Smith family Samuel Harrison Smith: Gray, James. The Mediatorial Reign of the Son of God; or, the Absolute Ability and Willingness of Jesus Christ to save all mankind, demonstrated from the Scriptures. In which work an attempt is made to rescue the Gospel call from false philosophy. Baltimore. Published by Cushing & Jewett. 1821. Location: Harold B. Lee Library, Brigham Young University on title page: Samuel Smith's Book February 20th 1830 Hyrum Smith Whiston, William, translated, The Works of Flavius Josephus. Baltimore. Published by Armstrong and Plaskitt. 1830. Purchase date unknown. Location: LDS archives inside: Hyrum smiths Book Illinois Period Alphabetical list of books donated by Joseph Smith to the Nauvoo Library and Literary Institute, 31 January 1844: Apochryphal Testament [William] Beaumont[']s Experiments [and Observations on the Gastric Juice] [James Arlington] Bennett[']s [The American System of Practical] Book Keeping, 2 copies Book of Mormon [James] Brown's [An] Appeal, [from the British System of] gram[mar] [James] Brown[']s [An] English Syntascope [John Brown] Dictionary of the Holy Bible Bruns' Travels Catholic Manual Catholic Piety [A.B. Cleveland] Studies in Poetry & Prose [John F. Dennett] Voyages & Travels of Ross[,] Perry & others [Orville Dewey] Old World & the New, vol 1st [Thomas] Dick[']s Philosophy [of a Future State] [Philip] Doddrige[']s Sermons [Benjamin Drake] Life of Tecunseh Epicureo [Hiram] Gillmore[']s Lectures [on Christianity] [Charles A. Goodrich] History of the United States [James] Hervey[']s Meditations [and Contemplations] Krumanacher[']s Works Merrills Harmony Metropolitan[: A Monthly Journal of Literature, Science, and the Fine Arts] [John Lawrence] Mosheim[']s Church History, 1 Vol [Joel] Parker[']s Lectures on Universalism [Parley P. Pratt] Millen[n]ium & other Poems [1840] Reld & other Travels [Charles] Rollin, 2 Vol[s] Sanders Discourse [Walter] Scott[']s Poetical Works, in 5 vols Incidents of Travel in Yucatan, by [John L.] Stephens 2 Vo[ls] [John L.] Stephens Travels in Central America, 2 Vo[ls] [Henry Philip Tappan] Review of Edward[']s On [the Freedom of] The Will Times and Seasons 1 2 3 Vol[s] also Vol[s] 1 & 2 [Francois M.A. Voltaire] Historie de Charles [XII] [Samuel] Whelpley[']s Compend[ium] [2 copies?] [Samuel Wilcox] Home Physician List from Kenneth W. Godfrey, "A Note on the Nauvoo Library and Literary Institute," Brigham Young University Studies 14 (Spring 1974):386-89. http://www.xmission.com/~research/about/books.htm