Numbers 3:1-13

1These also are the generations of Aaron and Moses in the day that the Lord spake with Moses in mount Sinai. 2And these are the names of the sons of Aaron; Nadab the firstborn, and Abihu, Eleazar, and Ithamar. 3These are the names of the sons of Aaron, the priests which were anointed, whom he consecrated to minister in the priest’s office.1 4And Nadab and Abihu died before the Lord, when they offered strange fire before the Lord, in the wilderness of Sinai, and they had no children: and Eleazar and Ithamar ministered in the priest’s office in the sight of Aaron their father.

5And the Lord spake unto Moses, saying, 6Bring the tribe of Levi near, and present them before Aaron the priest, that they may minister unto him. 7And they shall keep his charge, and the charge of the whole congregation before the tabernacle of the congregation, to do the service of the tabernacle. 8And they shall keep all the instruments of the tabernacle of the congregation, and the charge of the children of Israel, to do the service of the tabernacle. 9And thou shalt give the Levites unto Aaron and to his sons: they are wholly given unto him out of the children of Israel. 10And 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. 11And the Lord spake unto Moses, saying, 12And I, behold, I have taken the Levites from among the children of Israel instead of all the firstborn that openeth the matrix among the children of Israel: therefore the Levites shall be mine; 13Because all the firstborn are mine; for on the day that I smote all the firstborn in the land of Egypt I hallowed unto me all the firstborn in Israel, both man and beast: mine shall they be: I am the Lord.