Numbers 3:2-4

Living Bible

² Aaron’s sons were:^[a] Nadab (his oldest), Abihu, Eleazar, Ithamar. ³ All were anointed as priests and set apart to minister at the Tabernacle. ⁴ But Nadab and Abihu died before the Lord in the wilderness of Sinai when they used unholy fire. And since they had no children, this left only Eleazar and Ithamar to assist their father, Aaron.