Numbers 3:8-10

New American Standard Bible

⁸ They shall also take care of all the furnishings of the tent of meeting, along with the duties of the sons of Israel, to do the service of the tabernacle. ⁹ So you shall ^(A)assign the Levites to Aaron and to his sons; they are exclusively assigned to him from the sons of Israel. ¹⁰ So you shall appoint Aaron and his sons that ^(B)they may ^[a]keep their priesthood, but ^(C)the ^[b]layman who comes near shall be put to death.”