Ezekiel 4:12-16
12 And thou shalt eat it as barley cakes, and thou shalt bake it with dung that cometh out of man, in their sight. 13 And the LORD said, Even thus shall the children of Israel eat their defiled bread among the Gentiles, whither I will drive them. 14 Then said I, Ah Lord GOD! behold, my soul hath not been polluted: for from my youth up even till now have I not eaten of that which dieth of itself, or is torn in pieces; neither came there abominable flesh into my mouth. 15 Then he said unto me, Lo, I have given thee cow's dung for man's dung, and thou shalt prepare thy bread therewith. 16 Moreover he said unto me, Son of man, behold, I will break the staff of bread in Jerusalem: and they shall eat bread by weight, and with care; and they shall drink water by measure, and with astonishment:
Too bad Ezekiel didn't have ndavid for his Gehazi, the "prophet" would have been spared a lot of trouble!