4 Moreover lie thou upon thy left side, and lay the iniquity of the house of Israel upon it; [according to] the number of the days that thou shalt lie upon it, thou shalt bear their iniquity. 5 For I have appointed the years of their iniquity to be unto thee a number of days, even three hundred and ninety days: so shalt thou bear the iniquity of the house of Israel. 6 And again, when thou hast accomplished these, thou shalt lie on thy right side, and shalt bear the iniquity of the house of Judah: forty days, each day for a year, have I appointed it unto thee.
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.