Numbers 3:4

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.

Cross-references

Numbers 26:61 repeats that Nadab and Abihu died for offering unauthorized fire — the same event summarized here.

Leviticus 10:1 gives the original account of Nadab and Abihu offering unauthorized fire — the incident referenced here.

Leviticus 10:2 describes the fire from the LORD that consumed them — the consequence of the unauthorized offering mentioned here.

1 Chronicles 24:2 directly echoes that Nadab and Abihu died childless, leaving Eleazar and Ithamar as priests — the same outcome stated here.

1 Chronicles 6:50 lists the genealogy of Aaron's sons, including Eleazar — whose priestly service is noted here after Nadab and Abihu's death.