The Peak of Eloquence · Hadith 2005 (#Passage #364)

٢٩٧. وَقَالَ (عليه السلام): مَا أَكْثَرَ الْعِبَرَ وأَقَلَّ الِاعْتِبَارَ.

297. Amīr al-mu’minīn, peace be upon him, said: How many are the objects of lessons, but how few the taking of lessons. [1]

Gradings are classical jarḥ-wa-taʿdīl, name-matched to a rijāl index (not individually re-verified).