Numbers 5:20 in the King James Version
But if thou hast gone aside to another instead of thy husband, and if thou be defiled, and some man have lain with thee beside thine husband:
Context
19 The priest shall cause her to take an oath and shall tell the woman, “If no man has lain with you, and if you haven’t gone aside to uncleanness, being under your husband’s authority, be free from this water of bitterness that brings a curse.
20 But if you have gone astray, being under your husband’s authority, and if you are defiled, and some man has lain with you besides your husband—”
21 then the priest shall cause the woman to swear with the oath of cursing, and the priest shall tell the woman, “May the LORD make you a curse and an oath among your people, when the LORD allows your thigh to fall away, and your body to swell;