Numbers 5:15

He shall bring her offering for her— This offering was to be of a mean sort, unaccompanied either with oil or frankincense, to denote the mean and humble circumstances of the person on whose account it was offered. See Leviticus 5:11. The phrase at the close of this verse, an offering of memorial, bringing iniquity to remembrance, is rendered by the Vulgate, an offering investigating adultery; an offering for the discovery of adultery: which expresses the meaning, if not the letter of the Hebrew.