Numbers 5:18

15 Then let him take her to the priest, offering for her the tenth part of an ephah of barley meal, without oil or perfume; for it is a meal offering of a bitter spirit, a meal offering keeping wrongdoing in mind.

16 And the priest will make her come near and put her before the Lord;

17 And the priest will take holy water in a pot and put in it dust from the floor of the House;

18 And he will make the woman come before the Lord with her hair loose, and will put the meal offering, the offering of a bitter spirit, in her hands; and the priest will take in his hand the bitter water causing the curse;

19 And he will make her take an oath, and say to her, If no man has been your lover and you have not been with another in place of your husband, you are free from this bitter water causing the curse;

20 But if you have been with another in place of your husband and have made yourself unclean with a lover:

21 Then the priest will put the oath of the curse on the woman, and say to her, May the Lord make you a curse and an oath among your people, sending on you wasting of the legs and disease of the stomach;