Numbers 5:26

23 And the priest will put these curses in a book, washing out the writing with the bitter water;

24 And he will give to the woman the bitter water for drink; and the bitter water causing the curse will go into her.

25 And the priest will take from her hand the meal offering of doubt, waving it before the Lord, and will take it to the altar;

26 And he will take some of it in his hand, burning it on the altar as a sign, and then he will give the woman the bitter water.

27 And it will be that if the woman has become unclean, sinning against her husband, when she has taken the bitter water it will go into her body, causing disease of the stomach and wasting of the legs, and she will be a curse among her people.

28 But if she is clean she will be free and will have offspring.

29 This is the law for testing a wife who goes with another in place of her husband and becomes unclean;