Numbers 5:14-15

14“A husband may have a fit of jealousy and suspect his wife, whether she was actually unfaithful or not.

15He must then take his wife to the priest along with eight cups of barley flour as an offering for her. He must not pour olive oil on the flour or put frankincense on it, since it is a grain offering brought because of the husband’s jealousy, an offering used for a confession—to remind someone of a sin that was committed.