Yet they shall be ministers in my sanctuary, having charge at the gates of the house, and ministering to the house: they shall slay the burnt offering and the sacrifice for the people, and they shall stand before them to minister unto them.
And your brethren also of the tribe of Levi, the tribe of your father, bring with you, that they may be joined unto you, and minister unto you: but you and your sons with you shall minister before the tabernacle of witness.
And Nadab and Abihu died before the LORD, when they offered unholy 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.