"Now you, son of man, take a brick, set it in front of you, and draw the city of Jerusalem on it.
References for Ezekiel 4:1
Then lay siege against it: construct a siege wall, build a ramp, pitch military camps, and place battering rams against it on all sides.
Take an iron plate and set it up as an iron wall between yourself and the city. Turn your face toward it so that it is under siege, and besiege it. This will be a sign for the house of Israel.