1 Enoch 19:1
1 And Uriel said to me: 'Here shall stand the angels who have connected themselves with women, and their spirits assuming many different forms are defiling mankind and shall lead them astray into sacrificing to demons ⌈⌈as gods⌉⌉, (here shall they stand,) till ⌈⌈the day of⌉⌉ the great judgement in which they shall be judged till they are made an end of. 2 And the women also of the angels who went astray shall become sirens.' 3 And I, Enoch, alone saw the vision, the ends of all things: and no man shall see as I have seen.
1 Corinthians 10:20
18 Look at the people of Israel. Are not those who eat the sacrifices partners in the altar? 19 Am I saying that idols or food sacrificed to them amount to anything? 20 No, I mean that what the pagans sacrifice is to demons and not to God. I do not want you to be partners with demons. 21 You cannot drink the cup of the Lord and the cup of demons. You cannot take part in the table of the Lord and the table of demons. 22 Or are we trying to provoke the Lord to jealousy? Are we really stronger than he is?
Notes and References
"... It is worth pausing to consider the theology of Paul at this point. In the undisputed Pauline letters, demons are mentioned in only one passage (1 Corinthians 10:20f; elsewhere only 1 Timothy 4:1) ... what pagans sacrifice they offer to demons and not to God ... In all this there are clearly parallels to the Greek concept of 'demon', but the actual overlap is limited. 'Demon' is used primarily as a contemptuous name for the heathen gods of idol worship (LXX Psalm 96:5, LXX Isaiah 65:3, 11; Baruch 4:7; Jubilees 1:11; 1 Enoch 19:1, 99:7) ..."
Dunn, James D. G. Demon-Possession and Exorcism in The New Testament (pp. 210-225) Churchman: A Quarterly Journal of Anglican Theology, 1980