At that time the LORD separated the tribe of Levi to bear the ark of the covenant of the LORD, to stand before the LORD to minister to Him and to bless in His name, to this day.
Deuteronomy 10:8
Surrounding context
10:7 From there they journeyed to Gudgodah, and from Gudgodah to Jotbathah, a land of rivers of water.
10:8 At that time the LORD separated the tribe of Levi to bear the ark of the covenant of the LORD, to stand before the LORD to minister to Him and to bless in His name, to this day.
10:9 Therefore Levi has no portion nor inheritance with his brethren; the LORD is his inheritance, just as the LORD your God promised him.)