Numbers 5:19-20

19And the priest shall have her take an oath and shall say to the woman, “If no man has had sexual relations with you and if you have not 1gone astray into uncleanness, as you are under the authority of your husband, be 2immune to this water of bitterness that brings a curse;

20if, however, you have 3gone astray, though under the authority of your husband, and if you have defiled yourself and a man other than your husband has had sexual intercourse with you”