Numbers 5:12

“Speak unto the children of Israel, and say unto them, etc.] It being an affair which concerned them: if any man’s wife go aside, and commit a trespass against him; the sin of adultery, which is a going aside out of the way of virtue and chastity, and a trespass against an husband, a breach of the marriage covenant with him, a defiling his bed, doing an injury and dishonour to him, bringing confusion into his family, and a spurious offspring to possess his substance: though this is to be understood, not of certain adultery, of which there is plain and full proof, for then there would be no occasion of such a trial, as is afterwards directed to; besides, her husband, in such a case, might put…”

“THE TRIAL OF JEALOUSY. (Num. 5:11-31) if any man's wife go aside, and commit a trespass against him--This law was given both as a strong discouragement to conjugal infidelity on the part of a wife, and a sufficient protection of her from the consequences of a hasty and groundless suspicion on the part of the husband. His suspicions, however, were sufficient in the absence of witnesses (Lev 20:10) to warrant the trial described; and the course of proceeding to be followed was for the jealous husband to bring his wife unto the priest with an offering of barley meal, because none were allowed to approach the sanctuary empty handed (Exo 23:15). On other occasions, there were mingled with the…”

“The trial of jealousy. Since the crime of adultery is especially defiling and destructive of the very foundations of social order, the whole subject is dealt with at a length proportionate to its importance. The process prescribed has lately been strikingly illustrated from an Egyptian “romance,” which refers to the time of Rameses the Great, and may therefore well serve to illustrate the manners and customs of the Mosaic times. This mode of trial, like several other ordinances, was adopted by Moses from existing and probably very ancient and widely spread institutions. Numbers 5:15 The offering was to be of the cheapest and coarsest kind, barley (compare 2 Kings 7:1, 2 Kings 7:16, 2 Kings…”

“If a man's wife - This law was given partly to deter wives from adulterous practices, and partly to secure wives against the rage of their hard - hearted husbands, who otherwise might upon mere suspicions destroy them, or at least put them away. There was not like fear of inconveniences to the husband from the jealousy, of the wife, who had not that authority and power, and opportunity for the putting away or killing the husband, as the husband had over the wife. Go aside - From the way of religion and justice, and that either in truth, or in her husband's opinion. Numbers 5:15”

“Num 5:19, Num 5:20; Pro 2:16, Pro 2:17 Numbers 5:13”