Seventy elders of the house of Israel were standing in front of them, including Jaazaniah son of Shaphan. They all were holding censers, producing a sweet-smelling cloud of incense that rose above them.
Each one will take his incense burner, put incense in it, and offer it before the Lord. All 250 of you will use your incense burners and Aaron will as well.”
The earth opened up and swallowed them down, along with Korah. His followers died when the fire burned up 250 men. What happened to them was a warning to the Israelites.
Nadab and Abihu died in the Lord's presence when they offered forbidden fire before the Lord in the Sinai desert. Since they didn't have any sons, Eleazar and Ithamar served as priests while their father Aaron was alive.