And you shall give the Levites to Aaron and his sons; they are given entirely to him from among the children of Israel.
Numbers 3:9
Surrounding context
3:8 Also they shall attend to all the furnishings of the tabernacle of meeting, and to the needs of the children of Israel, to do the work of the tabernacle.
3:9 And you shall give the Levites to Aaron and his sons; they are given entirely to him from among the children of Israel.
3:10 So you shall appoint Aaron and his sons, and they shall attend to their priesthood; but the outsider who comes near shall be put to death."