Numbers 5:19-24

19And the priest shall cause her to swear, and shall say unto the woman, If no man have lain with thee, and if thou have not gone aside to uncleanness, being under thy husband, be thou free from this water of bitterness that causeth the curse. 20But if thou have gone aside, being under thy husband, and if thou be defiled, and some man have lain with thee besides thy husband: 21then the priest shall cause the woman to swear with the oath of cursing, and the priest shall say unto the woman, Jehovah make thee a curse and an oath among thy people, when Jehovah doth make thy thigh to fall away, and thy body to swell; 22and this water that causeth the curse shall go into thy bowels, and make thy body to swell, and thy thigh to fall away. And the woman shall say, Amen, Amen.

23And the priest shall write these curses in a book, and he shall blot them out into the water of bitterness: 24and he shall make the woman drink the water of bitterness that causeth the curse; and the water that causeth the curse shall enter into her and become bitter.