Book of Jubilees 33:9–19

⁹ And Jacob did not approach her again because Reuben had defiled her. And as for any man who uncovers his father's skirt his deed is wicked exceedingly, for he is abominable before the Lord. (JUB) ¹⁰ For this reason it is written and ordained on the heavenly tablets that a man should not lie with his father's wife, and should not uncover his father's skirt, for this is unclean: they shall surely die together, the man who lies with his father's wife and the woman also, for they have wrought uncleanness on the earth. (JUB) ¹¹ And there shall be nothing unclean before our God in the nation which He has chosen for Himself as a possession. (JUB) ¹² And again, it is written a second time: 'Cursed be he who lieth with the wife of his father, for he hath uncovered his father's shame'; and all the holy ones of the Lord said 'So be it; so be it.' (JUB) ¹³ And do thou, Moses, command the children of Israel that they observe this word; for it (entails) a punishment of death; and it is unclean, and there is no atonement for ever to atone for the man who has committed this, but he is to be put to death and slain, and stoned with stones, and rooted out from the midst of the people of our God. (JUB) ¹⁴ For to no man who does so in Israel is it permitted to remain alive a single day on the earth, for he is abominable and unclean. (JUB) ¹⁵ And let them not say: to Reuben was granted life and forgiveness after he had lain with his father's concubine, and to her also though she had a husband, and her husband Jacob, his father, was still alive. (JUB) ¹⁶ For until that time there had not been revealed the ordinance and judgment and law in its completeness for all, but in thy days (it has been revealed) as a law of seasons and of days, and an everlasting law for the everlasting generations. (JUB) ¹⁷ And for this law there is no consummation of days, and no atonement for it, but they must both be rooted out in the midst of the nation: on the day whereon they committed it they shall slay them. (JUB) ¹⁸ And do thou, Moses, write (it) down for Israel that they may observe it, and do according to these words, and not commit a sin unto death; for the Lord our God is judge, who respects not persons and accepts not gifts. (JUB) ¹⁹ And tell them these words of the covenant, that they may hear and observe, and be on their guard with respect to them, and not be destroyed and rooted out of the land; for an uncleanness, and an abomination, and a contamination, and a pollution are all they who commit it on the earth before our God. (JUB)