4 But 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. So Eleazar and Ithamar ministered in the priest's office in the presence and under the supervision of Aaron their father. [Lev. 10:1-4.]
5 And the Lord said to Moses,
6 Bring the tribe of Levi near and set them before Aaron the priest, that they may minister to him.
7 And they shall carry out his instructions and the duties connected with the whole assembly before the Tent of Meeting, doing the service of the tabernacle.
8 And they shall keep all the instruments and furnishings of the Tent of Meeting and take charge of [attending] the Israelites, to serve in the tabernacle.
9 And you shall give the Levites [as servants and helpers] to Aaron and his sons; they are wholly given to him from among the Israelites.
10 And you shall appoint Aaron and his sons, and they shall observe and attend to their priest's office; but the excluded [anyone daring to assume priestly duties or privileges who is not of the house of Aaron and called of God] who comes near [the holy things] shall be put to death.