19 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.

Read Numbers 5:19 Using Other Translations

And the priest shall charge her by an oath, and say unto the woman, If no man have lain with thee, and if thou hast not gone aside to uncleanness with another instead of thy husband, be thou free from this bitter water that causeth the curse:
Then the priest shall make her take an oath, saying, 'If no man has lain with you, and if you have not turned aside to uncleanness while you were under your husband's authority, be free from this water of bitterness that brings the curse.
The priest will then put the woman under oath and say to her, ‘If no other man has had sex with you, and you have not gone astray and defiled yourself while under your husband’s authority, may you be immune from the effects of this bitter water that brings on the curse.