Numbers 16:29-31

Young's Literal Translation

²⁹ if according to the death of all men these die -- or the charge of all men is charged upon them -- Jehovah hath not sent me;

³⁰ and if a strange thing Jehovah do, and the ground hath opened her mouth and swallowed them, and all that they have, and they have gone down alive to Sheol -- then ye have known that these men have despised Jehovah.'

³¹ And it cometh to pass at his finishing speaking all these words, that the ground which [is] under them cleaveth,