Not sure about this but I came across an article before that said "Muhammad got this actually not from the angels but from the devil" Everytime he goes to the cave this angel came to him and he is always afraid of this angel and this angel never said like other angels in Old Testaments saying "Do not be afraid, I come in Peace" NOt sure every messages he received from angels of God or not. And I found this link about 72 virgins suppose to be grapes or something like that but misintepret should be grapes..
http://ko.offroadpakistan.com/.../..._not_virgins.html
Did he speak in the name of "the eternal," YAHWEH?
Secondly, did Muhammad speak in the name of God, using that name which God gave as a signature for His authority, the name Yahweh? Though the term YHWH was used 6,823 times in the Bible, it is not used once in the Qur'an, and perhaps was not even known by Muhammad, since if he was supposedly illiterate in his own language, Arabic, it is hardly likely that he would have been able to read Hebrew.
Yet, is it not curious that Muhammad, the "seal of the prophets," he who was commissioned to bring the 'final revelation' did not even know the name of the God by whom he was commissioned? Is it not also curious that the God of Abraham, Isaac, Moses and David would go to the trouble of revealing His unique name in the Hebrew language, which was then passed down from generation to generation, up to the present day, yet somehow this name was forgotten or never revealed in the language which Muhammad claimed was God's special language, Arabic?