Leviticus 20:21

18 And if a man shall lie with a woman in her infirmity, and uncover her nakedness, her flux doth he lay bare, and she hath uncovered the fountain of her blood; and both of them shall be cut off from among their people.

19 And the nakedness of thy mother's sister, and of thy father's sister shalt thou not uncover; for he hath laid naked his near relation: they shall bear their iniquity.

20 And if a man lie with his aunt, he hath uncovered his uncle's nakedness: their sin shall they bear: they shall die childless.

21 And if a man take his brother's wife, it is an unclean thing: he hath uncovered his brother's nakedness: they shall be childless.

22 And ye shall observe all my statutes, and all mine ordinances, and do them, that the land whither I bring you to dwell therein vomit you not out.

23 And ye shall not walk in the customs of the nation which I am casting out before you; for all these things have they done, and they became an abomination to me.

24 And I have said unto you, Ye shall possess their land, and I will give it unto you for a possession; a land flowing with milk and honey: I am Jehovah your God, who have separated you from the peoples.