Numbers 3:4

4 Nadab and Abihu died before Yahweh, when they offered strange fire before Yahweh, in the wilderness of Sinai, and they had no children. Eleazar and Ithamar ministered in the priest's office in the presence of Aaron their father.

Numbers 3:4 In-Context

2 These are the names of the sons of Aaron: Nadab the firstborn, and Abihu, Eleazar, and Ithamar.
3 These are the names of the sons of Aaron, the priests who were anointed, whom he consecrated to minister in the priest's office.
4 Nadab and Abihu died before Yahweh, when they offered strange fire before Yahweh, in the wilderness of Sinai, and they had no children. Eleazar and Ithamar ministered in the priest's office in the presence of Aaron their father.
5 Yahweh spoke to Moses, saying,
6 "Bring the tribe of Levi near, and set them before Aaron the priest, that they may minister to him.
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