Numbers 16:28-30

Young's Literal Translation

²⁸ And Moses saith, `By this ye do know that Jehovah hath sent me to do all these works, that [they are] not from my own heart;

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.'