Jamieson, Fausset and Brown on Ezekiel 13:11

11. overflowing--inundating; such as will at once wash away the mere clay mortar. The three most destructive agents shall co-operate against the wall--wind, rain, and hailstones. These last in the East are more out of the regular course of nature and are therefore often particularly specified as the instruments of God's displeasure against His foes (Ex 9:18; Jos 10:11; Job 38:22; Psa 18:12, 13; Is 28:2; 30:30; Re 16:21). The Hebrew here is, literally, "stones of ice." They fall in Palestine at times an inch thick with a destructive velocity. The personification heightens the vivid effect, "O ye hail stones." The Chaldeans will be the violent agency whereby God will unmask and refute them, overthrowing their edifice of lies.