The Book of Jubilees

21 from fornication and uncleanness and all iniquity. 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
22 chose: and they made the beginning of uncleanness. And they begat sons the Naphidim, and they were all unlike, and they devoured one another: and the Giants slew the Naphil (Naphelim), and the
23 Naphil slew the Eljo (Elioud), and the Eljo mankind, and one man another. And every one sold himself
24 to work iniquity and to shed much blood, and the earth was filled with iniquity. And after this they sinned against the beasts and birds, and all that moves and walks on the earth: and much blood was shed on the earth, and every imagination and desire of men imagined vanity and evil
25 continually. And the Lord destroyed everything from off the face of the earth; because of the wickedness of their deeds, and because of the blood which they had shed in the midst of the earth 26 He destroyed everything. 'And we were left, I and you, my sons, and everything that entered with us into the ark, and behold I see your works before me that ye do not walk in righteousness: for in the path of destruction ye have begun to walk, and ye are parting one from another, and are envious one of another, and (so it comes) that ye are not in harmony, my sons, each with his brother.
27 For I see, and behold the demons have begun (their) seductions against you and against your children and now I fear on your behalf, that after my death ye will shed the blood of men upon the earth,
28 and that ye, too, will be destroyed from the face of the earth. For whoso sheddeth man's blood, and whoso eateth the blood of any flesh, shall all be destroyed from the earth.
29 And there shall not be left any man that eateth blood, or that sheddeth the blood of man on the earth, Nor shall there be left to him any seed or descendants living under heaven; For into Sheol shall they go, And into the place of condemnation shall they descend, And into the darkness of the deep shall they all be removed by a violent death.
30 There shall be no blood seen upon you of all the blood there shall be all the days in which ye have killed any beasts or cattle or whatever flies upon the earth, and work ye a good work to your
31 souls by covering that which has been shed on the face of the earth. And ye shall not be like him who eats with blood, but guard yourselves that none may eat blood before you: cover the blood,
32 for thus have I been commanded to testify to you and your children, together with all flesh. And suffer not the soul to be eaten with the flesh, that your blood, which is your life, may not be required
33 at the hand of any flesh that sheds (it) on the earth. For the earth will not be clean from the blood which has been shed upon it; for (only) through the blood of him that shed it will the earth be 34 purified throughout all its generations.