Numbers 15:30-31

30But a person might do something that he knows to be wrong. He does it because he wants to do it. That person is as bad as someone who insults the Lord. It does not matter whether he is an Israelite or a foreign person. You must make that person separate from all the people.

31That person thought that the Lord's command was not important. He has not obeyed God's rules. So you must make that person completely separate from the people. He is a guilty person.’