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.
Clement of Alexandria Selections from the Prophets 53:4
Eclogae Propheticae"... Day to day pours forth speech and night to night declares knowledge." ... "Night to Night": All the demons knew that it was the Lord who arose after the passion, for Enoch already said that the angels who transgressed taught humanity astronomy, divination, and the other arts.
Notes and References
"... In Selections from the Prophets 53.4 one encounters another early Christian reference to the angel myth. and again it is attributed to Enoch. The passage is set in a context in which Ps 19:2 is under discussion ... In explanation, Clement notes that the demons have special knowledge ... It is undoubted that Clement has in mind the various arts, enumerated in 1 Enoch 7:1-8:3, which the fallen angels taught to humans. The three categories that he mentions - astronomy, manticism, and the other arts - are not named in those very words and in that precise order in 1 Enoch 7: 1-8:3, but all appear to he there ... So, in this instance, too, an early Christian writer alludes to rather than quotes 1 Enoch, but he gives sufficient information so that the object of the allusion can be identified. The Book of Enoch could, therefore, be used to explain a phrase in a psalm. Also, Clement's use indicates that he regarded the book not as a recent forgery, but as an ancient work. This ancient work was, on this point, a reliable source of information ..."
VanderKam, James C. The Jewish Apocalyptic Heritage in Early Christianity (pp. 45-46) Fortress Press, 1993