'Dust on Their Heads' in the Bible

And Joshua tore his clothes and fell to the ground on his face before the ark of Yahweh until the evening, he and the elders of Israel; and they put dust on their heads.

Thus they lifted up their eyes from afar, but they did not recognize him, so they raised their voice, and they wept, and each man tore his outer garment and threw dust on their heads {toward the sky}.

and they will lament over you with their voice, and they will cry out bitterly, and they will throw dust on their heads, [and] they will roll in the dust.