But if Hashem creates a creation, and the ground opens its mouth and swallows them and all that is theirs, and they go down alive into the pit — then you shall know that these men have spurned Hashem.
Torah Temimah: Sanhedrin 110a — Rava: Moshe said before the Holy One: if You created Gehinom — good; if not — let Hashem create it (bring near the mouth of Gehinom).
English: Moshe said before the Holy One, blessed be He: Master of the Universe, if You created Gehinom — good; and if not — let Hashem create it — rather, to bring near the mouth of Gehinom.
Request for an opened mouth of the earth.
The “creation” is not a new thing under the sun, but the drawing near of Gehinom’s mouth to the place of the rebels.