so that another man has sexual relations with her, and this is hidden from her husband and her impurity is undetected (since there is no witness against her and she has not been caught in the act),

Then the priest shall put the woman under oath and say to her, “If no other man has had sexual relations with you and you have not gone astray and become impure while married to your husband, may this bitter water that brings a curse not harm you.

But if you have gone astray while married to your husband and you have made yourself impure by having sexual relations with a man other than your husband”—

Moab Seduces Israel

While Israel was staying in Shittim, the men began to indulge in sexual immorality with Moabite women,