Leviticus 20:22-25

‘You are therefore to keep all My statutes and all My ordinances and do them, so that the land to which I am bringing you to live will not spew you out. Moreover, you shall not follow the customs of the nation which I will drive out before you, for they did all these things, and therefore I have abhorred them. Hence I have said to you, “You are to possess their land, and I Myself will give it to you to possess it, a land flowing with milk and honey.” I am the LORD your God, who has separated you from the peoples. You are therefore to make a distinction between the clean animal and the unclean, and between the unclean bird and the clean; and you shall not make yourselves detestable by animal or by bird or by anything that creeps on the ground, which I have separated for you as unclean.