Numbers 5:21-22

21then the priest shall put the woman under the oath of the curse, and he shall say to the woman—“the Lord make you a curse and an oath among your people, when the Lord makes your thigh rot and your belly swell;

22and may this water that causes the curse go into your stomach, and make your belly swell and your thigh rot.” ‘Then the woman shall say, “Amen, so be it.”