41 "And you, son of man, take a brick and lay it before you, and engrave on it a city, even Jerusalem. 2 And put siegeworks against it, and build a siege wall against it, and cast up a mound against it. Set camps also against it, and plant battering rams against it all around. 3 And you, take an iron griddle, and place it as an iron wall between you and the city; and set your face toward it, and let it be in a state of siege, and press the siege against it. This is a sign for the house of Israel. 4 "Then lie on your left side, and place the punishment[1] of the house of Israel upon it. For the number of the days that you lie on it, you shall bear their punishment.
Matthew Henry's Commentary on Ezekiel 4:1-4
Commentary on Ezekiel 4:1-8
(Read Ezekiel 4:1-8)
The prophet was to represent the siege of Jerusalem by signs. He was to lie on his left side for a number of days, supposed to be equal to the years from the establishment of idolatry. All that the prophet sets before the children of his people, about the destruction of Jerusalem, is to show that sin is the provoking cause of the ruin of that once flourishing city.