'Stone' in the Bible

Who put Abimelech, the son of Jerubbaal, to death? did not a woman send a great stone down on him from the wall, putting him to death at Thebez? why did you go so near the wall? Then say to him, Your servant Uriah the Hittite is among the dead.

So the man went, and came to David, and gave him all the news which Joab had sent him to give; then David was angry with Joab and said, Why did you go so near the town for the fight? was it not certain that their archers would be on the wall? who put Abimelech, the son of Jerubbaal, to death? did not a woman send a great stone down on him from the wall, putting him to death at Thebez? why did you go so near the wall?

And if he has gone into some town, then let all Israel take strong cords to that town, and we will have it pulled into the valley, till not one small stone is to be seen there.

When they were at the great stone which is in Gibeon, Amasa came face to face with them. Now Joab had on his war-dress, and round him a band from which his sword was hanging in its cover; and while he was walking, it came out, falling to the earth.