Deuteronomy 18:5

This shall be the priests' due from the people, from those who offer a sacrifice, whether it be ox o...

The first fruits of your grain, of your new wine, and of your oil, and the first of the fleece of yo...

If a Levite comes from any of your gates out of all Israel, where he lives as a foreigner, and comes...

then he shall minister in the name of the Lord his God, as all his brothers the Levites do, who stan...