Numbers 5:19

And the priest shall take holy water in an earthen vessel; and of the dust that is in the floor of the tabernacle the priest shall take, and put [it] into the water:

And the priest shall set the woman before the LORD, and uncover the woman's head, and put the offering of memorial in her hands, which [is] the jealousy offering: and the priest shall have in his hand the bitter water that causeth the curse:

But if thou hast gone aside [to another] instead of thy husband, and if thou be defiled, and some man have lain with thee beside thine husband:

Then the priest shall charge the woman with an oath of cursing, and the priest shall say unto the woman, The LORD make thee a curse and an oath among thy people, when the LORD doth make thy thigh to rot, and thy belly to swell;