And he brought forth the people that were therein, and put them under saws, and under harrows of iron, and under axes of iron, and made them pass through the brickkiln: and thus did he unto all the cities of the children of Ammon. And David and all the people returned unto Jerusalem.

Draw thee water for the siege; strengthen thy fortresses; go into the clay, and tread the mortar; make strong the brickkiln.