5 For I assign to you a number of days, three hundred ninety days, equal to the number of the years of their punishment; and so you shall bear the punishment of the house of Israel.

Matthew Henry's Commentary on Ezekiel 4:5

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.