12 Speak to the Israelites and say to them: If any man's wife goes astray and is unfaithful to him, 13 if a man has had intercourse with her but it is hidden from her husband, so that she is undetected though she has defiled herself, and there is no witness against her since she was not caught in the act; 14 if a spirit of jealousy comes on him, and he is jealous of his wife who has defiled herself; or if a spirit of jealousy comes on him, and he is jealous of his wife, though she has not defiled herself; 15 then the man shall bring his wife to the priest. And he shall bring the offering required for her, one-tenth of an ephah of barley flour. He shall pour no oil on it and put no frankincense on it, for it is a grain offering of jealousy, a grain offering of remembrance, bringing iniquity to remembrance. 16 Then the priest shall bring her near, and set her before the Lord; 17 the priest shall take holy water in an earthen vessel, and take some of the dust that is on the floor of the tabernacle and put it into the water.
Matthew Henry's Commentary on Numbers 5:12-17
Commentary on Numbers 5:11-31
(Read Numbers 5:11-31)
This law would make the women of Israel watch against giving cause for suspicion. On the other hand, it would hinder the cruel treatment such suspicions might occasion. It would also hinder the guilty from escaping, and the innocent from coming under just suspicion. When no proof could be brought, the wife was called on to make this solemn appeal to a heart-searching God. No woman, if she were guilty, could say "Amen" to the adjuration, and drink the water after it, unless she disbelieved the truth of God, or defied his justice. The water is called the bitter water, because it caused the curse. Thus sin is called an evil and a bitter thing. Let all that meddle with forbidden pleasures, know that they will be bitterness in the latter end. From the whole learn, 1. Secret sins are known to God, and sometimes are strangely brought to light in this life; and that there is a day coming when God will, by Christ, judge the secrets of men according to the gospel, Romans 2:16. 2 In particular, Whoremongers and adulterers God will surely judge. Though we have not now the waters of jealousy, yet we have God's word, which ought to be as great a terror. Sensual lusts will end in bitterness. 3. God will manifest the innocency of the innocent. The same providence is for good to some, and for hurt to others. And it will answer the purposes which God intends.