1 Enoch 6:2

1 And it came to pass when the children of men had multiplied that in those days were born unto them beautiful and comely daughters. 2 And the angels, the children of the heaven, saw and lusted after them, and said to one another: 'Come, let us choose us wives from among the children of men and beget us children.' 3 And Semjâzâ, who was their leader, said unto them: 'I fear ye will not indeed agree to do this deed, and I alone shall have to pay the penalty of a great sin.' 4 And they all answered him and said: 'Let us all swear an oath, and all bind ourselves by mutual imprecations not to abandon this plan but to do this thing.' 5 Then sware they all together and bound themselves by mutual imprecations upon it.

Date: 200-50 B.C.E.
* Dates are based on scholarly estimates

Tatian Address to the Greeks 19

Oratio ad Graecos

THANKS ARE EVER DUE TO GOD. Even if you be healed by drugs (I grant you that point by courtesy), yet it behoves you to give testimony of the cure to God. For the world still draws us down, and through weakness I incline towards matter. For the wings of the soul were the perfect spirit, but, having cast this off through sin, it flutters like a nestling and falls to the ground. Having left the heavenly companionship, it hankers after communion with inferior things. The demons were driven forth to another abode; the first created human beings were expelled from their place: the one, indeed, were cast down from heaven; but the other were driven from earth, yet not out of this earth, but from a more excellent order of things than exists here now. And now it behoves us, yearning after that pristine state, to put aside everything that proves a hindrance. The heavens are not infinite, O man, but finite and bounded; and beyond them are the superior worlds which have not a change of seasons, by which various, diseases are produced, but, partaking of every happy temperature, have perpetual day, and light unapproachable by men below.

Date: 160-170 C.E.
* Dates are based on scholarly estimates