Leviticus 20:20-27

²⁰And the man that lieth with his uncle's wife, hath uncovered his uncle's nakedness: their sin shall they bear; childless shall they die.

²¹And if a man do take his brother's wife, it is an abominable act: the nakedness of his brother hath he uncovered; childless shall they remain.

²²And keep ye all my statutes, and all my ordinances, and do them; that the land, whither I bring you to dwell therein, may not vomit you forth.

²³And ye shall not walk in the customs of the nation which I cast out before you; for all these things they committed, and therefore I felt loathing for them.

²⁴And I said unto you, Ye shall possess their land, and I will give it unto you to possess it, a land flowing with milk and honey: I am the Eternal your God, who have separated you from the nations.

²⁵Ye shall therefore make a difference between the clean beast and the unclean, and between the unclean fowl and the clean; and ye shall not make your souls abominable by the beast, or by the fowl, or by any manner of thing that creepeth on the ground, which I have separated from you as unclean.

²⁶And ye shall be holy unto me, for I the Lord am holy; and I have separated you from the nations, that ye should be mine.

²⁷And if there be among men or women one that hath a familiar spirit, or that is a wizard, they shall be put to death; with stones shall they stone them; their blood shall be upon them.