Al-Mu'jam al-Awsat 901 — he said: The strongest of your Lord's

It is narrated from Sayyiduna Ali (may Allah be pleased with him) that he said: "The strongest of your Lord's creations are ten things: the mountains; and iron, which cuts the mountains; and fire, which melts iron; and water, which extinguishes fire; and the clouds made subservient between the heavens and the earth, which carry the water; and the wind, which carries the clouds; and man, who shields himself from the wind with his hand and goes about in it for his needs; and intoxication, which overpowers man; and sleep, which overpowers intoxication; and worry and grief, which drive sleep away. So the strongest of your Lord's creations is worry and grief."