Deuteronomy 18:4-7

Living Bible

⁴ In addition, the priests shall receive the harvest samples brought in thanksgiving to the Lord—the first of the grain, the new wine, the olive oil, and of the fleece at shearing time. ⁵ For the Lord your God has chosen the tribe of Levi, of all the tribes, to minister to the Lord from generation to generation.

^6-7 “Any Levite, no matter where he lives in the land of Israel, has the right to come to the sanctuary at any time and minister in the name of the Lord, just like his brother Levites who work there regularly.