Leviticus 18:3, 24, 30

According to the doings of the land of Egypt, where you dwelt, you shall not do; and according to the doings of the land of Canaan, where I am bringing you, you shall not do; nor shall you walk in their ordinances.

‘Do not defile yourselves with any of these things; for by all these the nations are defiled, which I am casting out before you.

‘Therefore you shall keep My ordinance, so that you do not commit any of these abominable customs which were committed before you, and that you do not defile yourselves by them: I am the LORD your God.’ ”