Numbers 5:15

5:15 then the man must bring his wife to the priest, and he must bring the offering required for her, one tenth of an ephah of barley meal; he must not pour olive oil on it or put frankincense on it, because it is a grain offering of suspicion, a grain offering for remembering, for bringing iniquity to remembrance.

Numbers 5:30

5:30 or when jealous feelings come over a man and he becomes suspicious of his wife; then he must have the woman stand before the Lord, and the priest will carry out all this law upon her.