Numbers 5:13

and any person lie with her carnally, and it escape the notice of her husband, and it be hid, and she be polluted, though there be no witness against her, and she be not caught in the act;

and supposing any one shall lie with her carnally, and the thing shall be hid from the eyes of her husband, and she should conceal it and be herself defiled, and there be no witness with her, and she should not be taken;