'Potsherds' in the Bible

His undersides are jagged potsherds,spreading the mud like a threshing sledge.

Woe unto him that striveth with his Maker! Let the potsherd strive with the potsherds of the earth. Shall the clay say to him that fashioneth it, What makest thou? or thy work, He hath no hands?

And you will drink it, and you will drain [it], and its potsherds you will gnaw, and you will tear out your breasts, for {I myself} spoke," {declares} the Lord Yahweh.