In 2 Nephi 2:17, Lehi clearly states:
according to the things which I have read, I must need suppose that an angel of God, according to that which is written, had fallen from heaven; wherefore, he became a devil, having sought that which was evil before God. And because he had fallen from heaven, and had become miserable forever, he sought also the misery of all mankind. Wherefore, he said unto Eve, yea, even that old serpent, who is the devil, who is the father of all lies . . ."
Lehi's scriptural quotes or information most probably came from the brass plates but from whose writings? In our present book of Isaiah we find the following:
How art thou fallen from heaven, O Lucifer, son of the morning! how art thou cut down to the ground . . . For thou hast said in thine heart, I will ascend into heaven, I will exalt my throne above the stars of God . . . I will be like the most High. . . thou art cast out (Isaiah 14:12-14, 19--see 2 Nephi 24:12-14, 19)
It is not clear from our present Old Testament record what Lehi might have been reading. The specifics of an angel referred to as a "fallen angel," "that old serpent," and "the devil" do not appear in our present Bible until the New Testament book of Revelation:
And there was war in heaven: Michael and his angels fought against the dragon; and the dragon fought and his angels, and prevailed not; neither was their place found any more in heaven. And the great dragon was cast out, that old serpent, called the Devil, and Satan, which deceiveth the whole world: he was cast out into the earth, and his angels were cast out with him (Revelation 12:7-9)
However, nowhere in the Bible do we find the title "father of all lies." Yet in John 8:44 we find the following: "Ye are of your father the devil . . . When he speaketh a lie, he speaketh of his own: for he is a liar, and the father of it." What is interesting is that Jacob uses the title "father of lies" in speaking about the Atonement and how it overcomes the effects of the Fall (see 2 Nephi 9:9). This comes in the text just after Jacob has quoted Isaiah extensively. But more to the point, Jacob states that the Lord has spoken of these things "by the mouth of his holy prophets, even from the beginning down" (2 Nephi 9:2).
So perhaps part of Lehi's information came from Isaiah, and perhaps part from Zenos, or Zenock, or the writings of other prophets recorded on the brass plates "even from the beginning." [Alan C. Miner, Personal Notes] [See Vol. 6, Appendix C]