Leviticus 20:22

19 And thou shalt not uncover the nakedness of thy mother's sister, nor of thy father's sister: for he uncovereth his near kin: they shall bear their iniquity.

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

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

22 Ye shall therefore keep all my statutes, and all my judgments, and do them: that the land whither I bring you to dwell therein, may not vomit you out.

23 And ye shall not walk in the manners of the nations which I cast out before you: for they committed all these things, and therefore I abhorred them.

24 But I have said to you, Ye shall inherit their land, and I will give it to you to possess it, a land that floweth with milk and honey: I [am] the LORD your God, who have separated you from [other] people.

25 Ye shall therefore distinguish between clean beasts and unclean, and between unclean fowls and clean: and ye shall not make your souls abominable by beast or by fowl, or by any manner of living animal that creepeth on the ground, which I have separated from you as unclean.