Leviticus 20:20–26

²⁰If a man lies with his uncle’s wife, he has uncovered his uncle’s nakedness; they shall bear their sin, they shall die childless. ²¹If a man takes his brother’s wife, it is impurity; he has uncovered his brother’s nakedness, they shall be childless.

²²“You shall therefore keep all my statutes and all my ordinances, and do them; that the land where I am bringing you to dwell may not vomit you out. ²³And you shall not walk in the customs of the nation which I am casting out before you; for they did all these things, and therefore I abhorred them. ²⁴But I have said to you, ‘You shall inherit their land, and I will give it to you to possess, a land flowing with milk and honey.’ I am the Lord your God, who have separated you from the peoples. ²⁵You shall therefore make a distinction between the clean beast and the unclean, and between the unclean bird and the clean; you shall not make yourselves abominable by beast or by bird or by anything with which the ground teems, which I have set apart for you to hold unclean. ²⁶You shall be holy to me; for I the Lord am holy, and have separated you from the peoples, that you should be mine.