1 Enoch 8:1
1 And Azâzal taught men to make swords, knives, shields, and breastplates, and revealed to them the metals of the earth and how to work with them, as well as how to make bracelets, ornaments, and the use antimony, beautifying the eyelids, along with all kinds of precious stones and various dyes. 2 Widespread wickedness arose, and they engaged in fornication, were led astray, and corrupted all their ways. Semjâzâ taught spells and the cutting of roots, Armârôs taught how to break spells, Barâqîjâl taught astrology, Kôkabîal taught about the constellations, Ezêqêal taught about the clouds, Araqiêal taught the signs of the earth, Shamsiêal taught the signs of the sun, and Sariêal taught the course of the moon. And as men died, they cried out, and their cries ascended to heaven.
Commodianus On Christian Discipline 3
When Almighty God, to beautify the nature of the world, willed that that earth should be visited by angels, when they were sent down they despised His laws. Such was the beauty of women, that it turned them aside; so that, being contaminated, they could not return to heaven. Rebels from God, they uttered words against Him. Then the Highest uttered His judgment against them; and from their seed giants are said to have been born.
Notes and References
"... Commodian (mid-third century). Commodian was a Latin Christian poet who, though he became a bishop in North Africa, may have had some connection with Palestine. In his Instructiones adversus Gentium Deos pro Christiana Disciplina 3 Commodian, like the earlier apologists, deals with demons in connection with the angel story ... It is noteworthy that Commodian sets forth a rather full form of the Watcher myth, but his initial words reveal that he knew a version in which the descent was God's will, not the result of angelic lust from heaven ..."
VanderKam, James C. The Jewish Apocalyptic Heritage in Early Christianity (p. 82) Fortress Press, 1993