Numbers 16:35

16:35 Then a fire went out from the Lord and devoured the 250 men who offered incense.

Numbers 16:2

16:2 and rebelled against Moses, along with some of the Israelites, 250 leaders of the community, chosen from the assembly, famous men.

Numbers 26:10

26:10 The earth opened its mouth and swallowed them and Korah at the time that company died, when the fire consumed 250 men. So they became a warning.