The Book of the Cave of Treasures 74
1And the Magi lived with the Child three days, and they saw the hosts of heaven going up and coming down to Christ. And they heard the sound of the praises of the angels, who sang hymns and cried out, “ Holy, Holy, Holy, Mighty God, with whose praises the heavens and the earth are filled.’ And they were in great fear, and in truth they believed in Christ, and said, ‘“‘ This is the King Who hath come down from heaven and become man.” And Perézdhadh answered and said unto them, Now know I that the prophecy of Isaiah is true. For when I was in the school of the Hebrews I read in [the Book of] Isaiah, and I found [written] therein thus: ‘For unto us a child is born, and unto us a son hath been given. And His Name shall be called Wonderful, and Counsellor, and God, Giant of the Worlds’ ” (Isa. ix. 6). And it is written in another place, ‘ Behold, a virgin is with child, and she shall bring forth a son, and His name shall be called ‘Emmanuel,’ which is, being interpreted, ‘ God with us’’’ (Isa. vii. 14). And because He became like a man, and the angels were coming down from heaven to Him, truly Heis the Lord of angels and men. Andall the Magi believed and said, “ Truly this King is God. Kings are born unto us frequently, and mighty men, the sons of mighty men, are born unto us on earth, but it is an unheard-of thing for the angels to come down to them.” And straightway they all rose up, and did homage to Him as the Lord and King of the world. And having prepared food for their journey, they went down to their own country by a desert road.
See also: Isaiah 7:14, Isaiah 9:6