Num 5:15

וְהֵבִ֨יא הָאִ֣ישׁ אֶת־אִשְׁתּוֹ֮ אֶל־הַכֹּהֵן֒ וְהֵבִ֤יא אֶת־קָרְבָּנָהּ֙ עָלֶ֔יהָ עֲשִׂירִ֥ת הָאֵיפָ֖ה קֶ֣מַח שְׂעֹרִ֑ים לֹֽא־יִצֹ֨ק עָלָ֜יו שֶׁ֗מֶן וְלֹֽא־יִתֵּ֤ן עָלָיו֙ לְבֹנָ֔ה כִּֽי־מִנְחַ֤ת קְנָאֹת֙ ה֔וּא מִנְחַ֥ת זִכָּר֖וֹן מַזְכֶּ֥רֶת עָוֺֽן׃

then he is to bring his wife to the priest. He must also bring for her an offering of a tenth of an ephah of barley flour. He is not to pour oil over it or put frankincense on it, because it is a grain offering for jealousy, an offering of memorial as a reminder of iniquity.