Numbers 26:61

New International Version

But Nadab and Abihu died when they made an offering before the Lord with unauthorized fire.)

Cross References

Exodus 6:23

Aaron married Elisheba, daughter of Amminadab and sister of Nahshon, and she bore him Nadab and Abihu, Eleazar and Ithamar.

Numbers 3:4

Nadab and Abihu, however, died before the Lord when they made an offering with unauthorized fire before him in the Desert of Sinai. They had no sons, so Eleazar and Ithamar served as priests during the lifetime of their father Aaron.