Numbers 3:4-6

New Catholic Bible

⁴ Nadab and Abihu died before the Lord when they offered unclean fire to the Lord in the Sinai Desert. They had no children. Eleazar and Ithamar ministered as priests in the presence of their father Aaron.

The Tribe of Levi. ⁵ The Lord spoke to Moses, saying, ⁶ “Gather the tribe of Levi and have them stand before Aaron the priest so that they can minister to him.