Numbers 5:22

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;

And the priest shall write these curses in a book, and he shall blot [them] out with the bitter water:

And he shall cause the woman to drink the bitter water that causeth the curse: and the water that causeth the curse shall enter into her, [and become] bitter.