Numbers 16:32

16:32 and the earth opened its mouth and swallowed them, along with their households, and all Korah’s men, and all their goods.

Numbers 22:28

22:28 Then the Lord opened the mouth of the donkey, and she said to Balaam, “What have I done to you that you have beaten me these three times?”

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.