Before them stood seventy of the elders of the house of Israel, with Jaazaniah son of Shaphan standing among them. Each had his censer in his hand, and the fragrant cloud of incense was ascending.
and let each one of you take his censer and put incense on it and each one of you present his censer before the Lord, two hundred fifty censers, you also, and Aaron, each his censer.”
and the earth opened its mouth and swallowed them up along with Korah, when that congregation died, when the fire devoured two hundred fifty men, and they became a warning.
Nadab and Abihu died before the Lord when they offered unholy fire before the Lord in the wilderness of Sinai, and they had no children. Eleazar and Ithamar served as priests in the lifetime of their father Aaron.