He brought forth the people who were therein, and put them under saws, and under iron picks, and under axes of iron, and made them pass through the brick kiln: and he did so to all the cities of the children of Ammon. David and all the people returned to Jerusalem.

Take great stones in your hand, and hide them in mortar in the brick work, which is at the entry of Pharaoh's house in Tahpanhes, in the sight of the men of Judah;

Draw water for the siege. Strengthen your fortresses. Go into the clay, and tread the mortar. Make the brick kiln strong.