Musannaf Ibn Abi Shaybah 40673 — reports on Siffin

Abdullah bin Salamah said: I saw Sayyiduna Ammar (may Allah be pleased with him) in the Battle of Siffin. He was a very old man, dark-complexioned and tall; his hand was trembling and there was a spear in his hand. He was saying: "Even if the enemy were to strike us and crush us utterly, I would still be certain that our righteous ones are on the truth and that those people are on falsehood."