Hazrat Shaikh Abu Ismaïl Abdullah al-Herawi al-Ansari or Khajah Abdullah Ansari of Herat (1006–1088) (Persian: خواجه عبدالله انصاری) also known as Pir-i Herat (پیر هرات) (sage of Herat) was a Persian Sufi saint of Arab origin who lived in the 11th century in Herat (then Khorasan, now Herat province, Afghanistan). 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.
Read about Khwaja Abdullah Ansari in Wikipedia