'Millstone' in the Bible

“Do not take a pair of millstones or an upper millstone as security for a debt, because that is like taking a life as security.

But a woman threw the upper portion of a millstone on Abimelech’s head and fractured his skull.

At Thebez, who struck Abimelech son of Jerubbesheth? Didn’t a woman drop an upper millstone on him from the top of the wall so that he died? Why did you get so close to the wall?’—then say, ‘Your servant Uriah the Hittite is dead also.’”

His heart is as hard as a rock,as hard as a lower millstone!

“But whoever causes the downfall of one of these little ones who believe in Me—it would be better for him if a heavy millstone were hung around his neck and he were drowned in the depths of the sea!

“But whoever causes the downfall of one of these little ones who believe in Me—it would be better for him if a heavy millstone were hung around his neck and he were thrown into the sea.

It would be better for him if a millstone were hung around his neck and he were thrown into the sea than for him to cause one of these little ones to stumble.

Then a mighty angel picked up a stone like a large millstone and threw it into the sea, saying:In this way, Babylon the great citywill be thrown down violentlyand never be found again.