The Lord tells Ezekiel to take a brick, set it before him and draw on it the city of Jerusalem. Then he must act out a siege with a siege wall, a ramp, camps and battering rams, and set an iron plate between himself and the city, like a wall. With his face turned toward it, he will be a sign for the house of Israel.
Then he must lie on his left side to bear the guilt of the house of Israel for 390 days, a day for each year, and afterward on his right side for 40 days to bear the guilt of Judah, a day for each year. He will be bound with cords, with his arm bared, prophesying against the siege of Jerusalem.
For food, he is to mix wheat, barley, beans, lentils, millet and emmer in one vessel and make bread for those days, measured out: about twenty shekels a day, with water by measure. God first tells him to bake it over human dung, as a symbol that Israel will eat unclean bread among the nations. Ezekiel protests that he has never defiled himself, and the Lord allows him to use cow dung.
The chapter ends with the explanation: God will break the supply of bread in Jerusalem, and its people will eat bread by weight and in anxiety, drinking water by measure and in dismay, wasting away because of their guilt.