Numbers 3:10 in the King James Version
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.
Context
9 You shall give the Levites to Aaron and to his sons. They are wholly given to him on the behalf of the children of Israel.
10 You shall appoint Aaron and his sons, and they shall keep their priesthood, but the stranger who comes near shall be put to death.”
11 The LORD spoke to Moses, saying,