20 And in the twenty-eighth jubilee Noah began to enjoin upon his sons' sons the ordinances and commandments, and all the judgments that he knew, and he exhorted his sons to observe righteousness, and to cover the shame of their flesh, and to bless their Creator, and honour father and mother, and love their neighbour, and guard their souls from fornication and uncleanness and all iniquity. 21 For owing to these three things came the flood upon the earth, namely, owing to the fornication wherein the Watchers against the law of their ordinances went a whoring after the daughters of men, and took themselves wives of all which they chose: and they made the beginning of uncleanness. 22 And they begat sons the Naphidim, and they were all unlike, and they devoured one another: and the Giants slew the Naphil, and the Naphil slew the Eljo, and the Eljo mankind, and one man another. 23 And every one sold himself to work iniquity and to shed much blood, and the earth was filled with iniquity.

15 The words of the prophets agree with this, as it is written, 16 ‘After this I will return, and I will rebuild the fallen tent of David; I will rebuild its ruins and restore it, 17 so that the rest of humanity may seek the Lord, namely, all the Gentiles I have called to be my own,’ says the Lord, who makes these things 18 known from long ago. 19 “Therefore I conclude that we should not cause extra difficulty for those among the Gentiles who are turning to God, 20 but that we should write them a letter telling them to abstain from things defiled by idols and from sexual immorality and from what has been strangled and from blood. 21 For Moses has had those who proclaim him in every town from ancient times, because he is read aloud in the synagogues every Sabbath.”