Numbers 5:23-28
5:23 “‘Then the priest will write these curses on a scroll and then scrape them off into the bitter water.
5:24 He will make the woman drink the bitter water that brings a curse, and the water that brings a curse will enter her to produce bitterness.
5:25 The priest will take the grain offering of suspicion from the woman’s hand, wave the grain offering before the Lord, and bring it to the altar.
5:26 Then the priest will take a handful of the grain offering as its memorial portion, burn it on the altar, and afterward make the woman drink the water.
5:27 When he has made her drink the water, then, if she has defiled herself and behaved unfaithfully toward her husband, the water that brings a curse will enter her to produce bitterness – her abdomen will swell, her thigh will fall away, and the woman will become a curse among her people.
5:28 But if the woman has not defiled herself, and is clean, then she will be free of ill effects and will be able to bear children.