The Testament of Adam — True Church Edition
The Testament of Adam 12
1When Lamech had lived 777 years, Methuselah his father died; this was four years before the Flood. Then Lameth died after him, and his death was on the twenty-first [day] of September, in the 68th year of the life of Shem, the first-born of Noah. His son Noah swathed him, and enbalmed him, and put him in the Cave of Treasures. He mourned for him 40 days and remained with all the holy fathers, Noah and his children. The daughters of Cain conceived by the sons of Seth, and brought forth giant-sons.
2It was certainly supposed by some that the Book relates and says that the Angels came down to earth and mingled with the children of men, that those who came down and mingled with the children of men were really angels. This was only said on account of the sons of Seth and their union with the daughters of Cain, for God, may His name be glorified! had already out of His love to them, called them, as we said before, Sons of God and Angels of God.
3So he errs who thinks this; for union, that is, marriage, was not in the substance of spiritual beings, and not in their nature, and if it had been in them as it is in men, the Devils would not have left any one in the world alone without corrupting them, till not a virgin would have been left on the earth, for the foul Devils love corruption and fornication. As they cannot do this, they change their nature on account of it; they recommend it to men and make them love it.