Numbers 5:15

Overview - Numbers 5
The unclean are removed out of camp.
Restitution is to be made in trespass.
11 The trial of jealousy.
Treasury of Scripture Knowledge

Numbers 5:15  (King James Version)
Then shall the man bring his wife unto the priest, and he shall bring her offering for her, the tenth part of an ephah of barley meal; he shall pour no oil upon it, nor put frankincense thereon; for it is an offering of jealousy, an offering of memorial, bringing iniquity to remembrance.

her offering for her
This coarse offering, without oil or frankincense, implied the baseness of the crime of which the woman was suspected, and the mournful state of her family. It was not an atoning sacrifice, but an oblation for a memorial, as solemnly referring the decision to God, and calling upon him either to acquit or punish.
Leviticus 5:11 ; Hosea 3:2

1 Kings 17:18 ; Ezekiel 29:16 ; Hebrews 10:3