The Peak of Eloquence · Hadith 1042 (#Passage #1)
Chapter 206 | One hearing some of his men verbally abusing the Syrians during the Battle of Siffin
ومن كلام له (عليه السلام) وقد سمع قوما من أصحابه يسبون أهل الشام أيام حربهم بصفين
During the battle of Ṣiffīn Amīr al-mu’minīn heard some of his men abusing the Syrians, then he said:
Gradings are classical jarḥ-wa-taʿdīl, name-matched to a rijāl index (not individually re-verified).