parsa

And Og said in his heart, Behold now the whole camp of Israel takes up a space of three parsa, now will I smite them at once without sword or spear.

And Og went up Mount Jahaz, and took therefrom one large stone, the length of which was three parsa, and he placed it on his head, and resolved to throw it upon the camp of the children of Israel, to smite all the Israelites with that stone.