Job 20:14 in the World English Bible
yet his food in his bowels is turned. It is cobra venom within him.
Context
13 Though he spare it, and forsake it not; but keep it still within his mouth:
14 Yet his meat in his bowels is turned, it is the gall of asps within him.
15 He hath swallowed down riches, and he shall vomit them up again: God shall cast them out of his belly.