Numbers 3
6 Ref Make the tribe of Levi come near, and put them before Aaron the priest, to be his helpers,
7 Ref In order that they may be responsible to him and to all Israel for the care of the Tent of meeting, and to do the work of the House;
8 Ref And they will have the care of all the vessels of the Tent of meeting, and will do for the children of Israel all the necessary work of the House.
9 Ref Give the Levites to Aaron and his sons; so that they may be his without question from among the children of Israel.
10 Ref And give orders that Aaron and his sons are to keep their place as priests; any strange person who comes near is to be put to death.
11 And the Lord said to Moses,
12 Ref See, I have taken the Levites out of the children of Israel to be mine in place of the first sons of the children of Israel;
13 Ref For all the first sons are mine; on the day when I put to death all the first sons in the land of Egypt, I took for myself every first male birth of man and beast. They are mine; I am the Lord.