Numbers 5:18-20

18After the priest has the woman stand before the LORD, he is to let down her hair and place in her hands the grain offering of memorial, which is the grain offering for jealousy. The priest is to hold the bitter water that brings a curse. 19And he is to put the woman under oath and say to her, ‘If no other man has slept with you and you have not gone astray and become defiled while under your husband’s authority, may you be immune to this bitter water that brings a curse. 20But if you have gone astray while under your husband’s authority and have defiled yourself and lain carnally with a man other than your husband’—