Numbers 5:13

And a man lie with her carnally
That is, is suspected that he has so done, not that it is a clear case, for it follows;

and it be hid from the eyes of her husband, and be kept close;
so that it is not known by her husband, nor by any other; "she hath hid herself", so Ainsworth, being in a private place with another man, though warned to the contrary by her husband:

and she be defiled, and [there be] no witness against her;
of her being defiled, though there may be of her being in private with such a man:

neither she be taken [with the manner];
or in the act of uncleanness.