Numbers 3:4
Nadab and Abihu died in the LORD's presence when they offered unauthorized fire before him in the Sinai wilderness. Since they didn't have their own children, Eleazar and Ithamar ministered as priests under the authority of Aaron their father.
Leviticus 10:1-2
Aaron's sons Nadab and Abihu each took his own censer, placed fire in it, covered it with incense, and brought it into the LORD's presence as unauthorized fire that he had never prescribed for them.
Numbers 26:61
But Nadab and Abihu died when they offered unauthorized fire in the LORD's presence.
Treasury of Scripture Knowledge
Summary
And 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: and Eleazar and Ithamar ministered in the priest's office in the sight of Aaron their father.
General references
Bible References
General references
Numbers 26:61
But Nadab and Abihu died when they offered unauthorized fire in the LORD's presence.
Joshua 21:10
for the descendants of Aaron, one of the families of the descendants of Kohath, of the descendants of Levi, since the lot fell in their favor first.