The Book of Occultation — al-Ṭūsī · Hadith 245 (#Ḥadīth #10)
Chapter 24 | Stories of people with long lifespans from Arabs and non-Arabs are famous and chronicled in books and history.
ومنهم محصن بن غسان بن ظالم الزبيدي،عاش مائتي سنة وستا وخمسين سنة.
Mohsin bin Ghassan He was also a person who had a long life span. He lived for 256 years.
Gradings are classical jarḥ-wa-taʿdīl, name-matched to a rijāl index (not individually re-verified).