Numbers 5:13

“And a man lie with her carnally, etc.] That is, is suspected that he has so done, not that it is a clear case, for it follows; and it be hid from the eyes of her husband, and be kept close; so that it is not known by her husband, nor by any other; “she hath hid herself”, so Ainsworth, being in a private place with another man, though warned to the contrary by her husband: and she be defiled, and [there be] no witness against her; of her being defiled, though there may be of her being in private with such a man: neither she be taken [with the manner]; or in the act of uncleanness.”

“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…”

“Lev 18:20, Lev 20:10; Pro 7:18, Pro 7:19, Pro 30:20 Numbers 5:14”