The Peak of Eloquence · Hadith 1328 (#Passage #137)
Chapter 31 | Instructions for Hasan, when returning from Siffin
ومن وصية له (عليه السلام) للحسن بن علي (عليه السلام) كتبها إليه بحاضرين منصرفا من صفين
He wrote for al-Ḥasan ibn ‘Alī [1] (his son — peace be upon them), when Amīr al-mu’minīn encamped at al-Ḥāḍirīn on his way back from Ṣiffīn.
Gradings are classical jarḥ-wa-taʿdīl, name-matched to a rijāl index (not individually re-verified).