41 "You also, son of man, take a clay tablet and lay it before you, and portray on it a city, Jerusalem. 2 Lay siege against it, build a siege wall against it, and heap up a mound against it; set camps against it also, and place battering rams against it all around. 3 Moreover take for yourself an iron plate, and set it as an iron wall between you and the city. Set your face against it, and it shall be besieged, and you shall lay siege against it. This will be a sign to the house of Israel.
Matthew Henry's Commentary on Ezekiel 4:1-3
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.