Ezekiel 4:1LXX

1Thou also, son of man, take thee a tile, and lay it before thee, and pourtray upon it the city, Jerusalem:

2And lay siege against it, and build a fort against it, and cast a mount against it; set the camp also against it, and set rams against it round about.

3Moreover take thou unto thee an iron pan, and set it a wall of iron between thee and the city: and set thy face against it, and it shall be besieged, and thou shalt lay siege against it. This a sign to the house of Israel.