Question: Who was a famous Persian Sufi who lived in the 11th century in Herat who's works refer to a particularly important group of God's saints?
Sentence (from "Khwaja Abdullah Ansari"): One of the outstanding figures in Khorasan in the 5th/11th century: commentator of the Qur'an, traditionist, polemicist, and spiritual master, known for his oratory and poetic talents in Arabic and Persian.
Relevant evidence: No