Numbers 5:27 in the King James Version
And when he hath made her to drink the water, then it shall come to pass, that, if she be defiled, and have done trespass against her husband, that the water that causeth the curse shall enter into her, and become bitter, and her belly shall swell, and her thigh shall rot: and the woman shall be a curse among her people.
Context
26 The priest shall take a handful of the meal offering, as its memorial portion, and burn it on the altar, and afterward shall make the woman drink the water.
27 When he has made her drink the water, then it shall happen, if she is defiled and has committed a trespass against her husband, that the water that causes the curse will enter into her and become bitter, and her body will swell, and her thigh will fall away; and the woman will be a curse among her people.
28 If the woman isn’t defiled, but is clean; then she shall be free, and shall conceive offspring.