Great hailstones

In Ezek. xiii, we find, that the self-constituted prophets of Israel promising peace to Jerusalem, when Yahweh had determined there should be no peace for her, is styled building up a wall, and daubing it with untempered mortar. Ezekiel was commanded to announce to them, that it should fall by an overflowing shower; and then addressing the constituents of the shower, he says, "And ye, O great hailstones, shall fall; and a stormy wind shall rend it." This prediction was afterwards fulfilled by the Chaldeans under Nebuchadnezzar, who as great hailstones, a mighty and strong power, demonstrated the flimsiness and instability of their wall by laying Jerusalem in ashes and destroying the liars out of her.

In the apocalypse, hailstones operate conspicuously in demolishing walls daubed with untempered mortar, sweeping away the refuges of lies, and overflowing all hiding places.