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. 5 The number of days you bear their sin will match the number of years of their sin, namely, 390. For 390 days you will bear the sin of the family of Israel. 6 "Then, after you have done this, turn over and lie down on your right side and bear the sin of the family of Judah. Your assignment this time is to lie there for forty days, a day for each year of their sin.
Matthew Henry's Commentary on Ezekiel 4:4-6
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.