Leviticus 20:25-26

25“ ‘You must therefore make a distinction between clean and unclean animals and between unclean and clean birds. Do not defile yourselves by any animal or bird or anything that moves along the ground—those that I have set apart as unclean for you.

26You are to be holy to me because I, the LORD, am holy, and I have set you apart from the nations to be my own.