And thou shalt eat it as barley cakes, and thou shalt bake it with dung that cometh out of man, in their sight.

Wesley's Notes

4:12 As barley cakes - Because they never had enough to make a loaf with, they eat them as barley cakes. With dung - There was no wood left, nor yet dung of other creatures. This also was represented in a vision.

Jamieson-Fausset-Brown Bible Commentary

12. dung-as fuel; so the Arabs use beasts' dung, wood fuel being scarce. But to use human dung so implies the most cruel necessity. It was in violation of the law (De 14:3; 23:12-14); it must therefore have been done only in vision.

Matthew Henry's Concise Commentary

4:9-17 The bread which was Ezekiel's support, was to be made of coarse grain and pulse mixed together, seldom used except in times of urgent scarcity, and of this he was only to take a small quantity. Thus was figured the extremity to which the Jews were to be reduced during the siege and captivity. Ezekiel does not plead, Lord, from my youth I have been brought up delicately, and never used to any thing like this; but that he had been brought up conscientiously, and never had eaten any thing forbidden by the law. It will be comfortable when we are brought to suffer hardships, if our hearts can witness that we have always been careful to keep even from the appearance of evil. See what woful work sin makes, and acknowledge the righteousness of God herein. Their plenty having been abused to luxury and excess, they were justly punished by famine. When men serve not God with cheerfulness in the abundance of all things, God will make them serve their enemies in the want of all things.