Job 20:13 Midrash

יַחְמֹ֣ל עָ֭לֶיהָ וְלֹ֣א יַֽעַזְבֶ֑נָּה וְ֝יִמְנָעֶ֗נָּה בְּת֣וֹךְ חִכּֽוֹ׃

Though he spare it, and will not let it go, But keep it still within his mouth;