וְעֻגַ֥ת שְׂעֹרִ֖ים תֹּֽאכֲלֶ֑נָּה וְהִ֗יא בְּגֶֽלְלֵי֙ צֵאַ֣ת הָֽאָדָ֔ם תְּעֻגֶ֖נָה לְעֵינֵיהֶֽם׃ (ס)
And thou shalt eat it as barley cakes, and thou shalt bake it in their sight with dung that cometh out of man.’
Read kabbalistic (mystical) interpretation of Ezekiel 4:12: and classical mystical sources.