Ismah ibn al-Fadl
أبو الفضل عصمة بن الفضل
Fourth generation, died 250 AH in Nisapur. Named in the chains of 10 narrations of the library, 3 in Nasa'i, 3 in Ibn Majah, 4 in Darimi.
10narrations name him
3collections
250 AHhe died, in Nisapur
In the books of narrators: Trustworthy, ثقة.