41 "Now, son of man, take a brick and place it before you. Draw a picture of the city Jerusalem on it. 2 Then make a model of a military siege against the brick: Build siege walls, construct a ramp, set up army camps, lay in battering rams around it. 3 Then get an iron skillet and place it upright between you and the city - an iron wall. Face the model: The city shall be under siege and you shall be the besieger. This is a sign to the family of Israel. 4 "Next lie on your left side and place the sin of the family of Israel on yourself. You will bear their sin for as many days as you lie on your side.
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.