The Peak of Eloquence · Hadith 385 (#Passage #1)
Chapter 93 | Annihilation of the Kharijites, mischief mongering of the Umayyads, vastness of his own knowledge
ومن خطبة له (عليه السلام) وفيها ينبِّه أَمير المؤمنين على فضله وعلمه ويبيّن فتنة بني أُميّة
About the annihilation of the Khārijites, the mischief mongering of Umayyads and the vastness of his own knowledge [1]
Gradings are classical jarḥ-wa-taʿdīl, name-matched to a rijāl index (not individually re-verified).