Deuteronomy 18:4-6

New Century Version

⁴ Give them the first of your grain, new wine, and oil, as well as the first wool you cut from your sheep. ⁵ The Lord your God has chosen the priests and their descendants out of all your tribes to stand and serve the Lord always.

⁶ If a Levite moves from one of your towns anywhere in Israel where he lives and comes to the place the Lord will choose, because he wants to serve the Lord there,