Numbers 5:13

if a man lies with her sexually , and it is hidden from the eyes of her husband , and she is undetected though she has defiled herself, and there is no witness against her, since she was not taken in the act,

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),

And a man lie with her carnally, and it be hid from the eyes of her husband, and be kept close, and she be defiled, and there be no witness against her, neither she be taken with the manner ;