The Peak of Eloquence · Hadith 1552 (#Passage #361)
Chapter 58 | An announcement about what took place in Siffin
ومن كتاب له (عليه السلام) كتبه إلى أهل الأمصار يقتص فيه ما جرى بينه وبين أهل صفين
Written to the people of various localities describing what took place between him and the people of Ṣiffīn.
Gradings are classical jarḥ-wa-taʿdīl, name-matched to a rijāl index (not individually re-verified).