12 "Speak to the children of Israel, and say to them: 'If any man's wife goes astray and behaves unfaithfully toward him, 13 and a man lies with her carnally, and it is hidden from the eyes of her husband, and it is concealed that she has defiled herself, and there was no witness against her, nor was she caught-- 14 if the spirit of jealousy comes upon him and he becomes jealous of his wife, who has defiled herself; or if the spirit of jealousy comes upon him and he becomes jealous of his wife, although she has not defiled herself-- 15 then the man shall bring his wife to the priest. He shall bring the offering required for her, one-tenth of an ephah of barley meal; he shall pour no oil on it and put no frankincense on it, because it is a grain offering of jealousy, an offering for remembering, for bringing iniquity to remembrance. 16 'And 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.