Thou shalt appoint. — Or, number. The word is the same as that which is used for the numbering of the Israelites generally (Numbers 1:19) and for the numbering of the Levites (Numbers 3:15).
Related Commentaries of Numbers 3:10
Numbers 3:10
10 And thou shalt appoint Aaron and his sons, and they shall wait on their priest's office: and the stranger that cometh nigh shall be put to death.