Numbers 5:20-24

if, however, you have gone astray, though under the authority of your husband, and if you have defiled yourself and a man other than your husband has had sexual intercourse with you”

(then the priest shall have the woman swear with the oath of the curse, and the priest shall say to the woman), “may the Lord make you a curse and an oath among your people by the Lord’s making your thigh shriveled and your belly swollen;

and this water that brings a curse shall go into your stomach, to make your belly swell up and your thigh shrivel.” And the woman shall say, “Amen, Amen.”

‘The priest shall then write these curses on a scroll, and he shall wash them off into the water of bitterness.

Then he shall make the woman drink the water of bitterness that brings a curse, so that the water which brings a curse will go into her and cause bitterness.