Numbers 5:22-26

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.

And the priest shall take the grain offering of jealousy from the woman’s hand, and he shall wave the grain offering before the Lord and bring it to the altar;

and the priest shall take a handful of the grain offering as its reminder offering and offer it up in smoke on the altar, and afterward he shall make the woman drink the water.