Numbers 5:14-15

14and the spirit of jealousy come upon him, and he be jealous of his wife, and she have been defiled, — or if the spirit of jealousy come upon him, and he be jealous of his wife, and she have not been defiled,

15— then shall the man bring his wife unto the priest, and he shall bring her offering for her, a tenth part of an ephah of barley-meal; he shall pour no oil upon it, nor put frankincense thereon; for it is an oblation of jealousy, a memorial oblation, bringing iniquity to remembrance.