Numbers 5:19 (BSB)

And he is to put the woman under oath and say to her, ‘If no other man has slept with you and you have not gone astray and become defiled while under your husband’s authority, may you be immune to this bitter water that brings a curse.

From Numbers 5. Also in the ESV.

Commentary on Numbers 5:19

• Matthew Henry (Presbyterian), Matthew Henry's Complete Commentary on Numbers 5:11-31: We have here the law concerning the solemn trial of a wife whose husband was jealous of her. Observe, I. What was the case supposed: That a man had some reason to suspect his wife to have committed adultery, Num 5:12-14. Here, 1. The sin of adultery is justly represented as an exceedingly sinful sin; it is going aside from God and virtue, and the good way, Pro 2:17.
• John Gill (Reformed Baptist), Exposition of the Old and New Testaments on Numbers 5:19: And the priest shall charge her by an oath,.... Or give her her oath: and say unto the woman, if no man hath lain with thee: besides her husband: and thou hast not gone aside to uncleanness with another instead of thy husband; which is but another phrase expressive of the same thing, the sin of adultery: be thou free from this bitter water that...
• Keil & Delitzsch (Lutheran), Biblical Commentary on the Old Testament on Numbers 5:11-31: Num 5:11-31 Sentence of God upon Wives Suspected of Adultery. - As any suspicion cherished by a man against his wife, that she either is or has been guilty of adultery, whether well-founded or not, is sufficient to shake the marriage connection to its very roots, and to undermine, along with marriage, the foundation of the civil commonwealth, it was of the greatest importance to...