5:18 And the priest shall set the woman before the LORD, and uncover the woman's head, and put the offering of memorial in her hands, which [is] the jealousy offering: and the priest shall have in his hand the bitter water that causeth the {i} curse:
(i) It was so called by the effect, because it declared the woman to be accursed, and turned to her destruction.
5:18 Before the Lord - Before the tabernacle with her face towards the ark. Uncover her head - Partly that she might be made sensible how manifest she and all her ways were to God; partly in token of her sorrow for her sin, or at least for any cause of suspicion which she had given. In her hands - That she herself might offer it, and thereby call God to be witness of her innocency. Bitter - So called either from the bitter taste which the dust gave it, or from the bitter effects of it upon her, if she were guilty. That causeth the curse - Not by any natural power, but by a supernatural efficacy.
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, Ro 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.