'Dust' in the Bible

The elders of the Daughter of ZionSit on the ground keeping silent;They have thrown dust on their heads,They have covered themselves with sackcloth.The virgins of JerusalemHave bowed their heads to the ground.

Let him put his mouth in the dust [in recognition of his unworthiness];There may yet be hope.

The crown has fallen from our head [our honor is covered with dust]!Woe to us, for we have sinned!