Leviticus 11:31

11:31 These are the ones that are unclean to you among all the swarming things. Anyone who touches them when they die will be unclean until evening.

Leviticus 11:43

11:43 Do not make yourselves detestable by any of the swarming things. You must not defile yourselves by them and become unclean by them,

Leviticus 18:4

18:4 You must observe my regulations and you must be sure to walk in my statutes. I am the Lord your God.