Leviticus 18:3, 24, 30

You shall not do what is done in the land of Egypt where you lived, and you shall not do what is done in the land of Canaan where I am bringing you. You shall not follow their statutes (practices, customs).

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

So keep My command: do not practice any of the repulsive customs which have been practiced before you, so as not to defile yourselves by them; I am the LORD your God.’ ”