Numbers 3:8-10

Wycliffe Bible

⁸ and that they keep (charge of) the vessels of the tabernacle, and serve in the service of it.

⁹ And thou shalt give by free gift the Levites to Aaron and to his sons, to whom they be given (out) of the sons of Israel. (And thou shalt give the Levites as a gift to Aaron and his sons, to whom they be given from all the Israelites.)

¹⁰ Soothly thou shalt ordain Aaron and his sons on the religion of priesthood; a stranger that nigheth for to minister, shall die. (And thou shalt ordain Aaron and his sons to serve in the priesthood; a stranger who cometh near to try to minister, shall be put to death.)