Qutayba ibn Muslim
From historical evidence, it appears Tokharistan (Bactria) was the only area heavily colonized by Arabs where Buddhism flourished and the only area incorporated into the Arab empire where Sanskrit studies were pursued up to the conquest. Hui'Chao, who visited around 726, mentions that the Arabs ruled it and all the inhabitants were Buddhists. Balkh's final conquest was undertaken by Qutayba ibn Muslim in 705. Among Balkh's Buddhist monasteries, the largest was "Nava Vihara", later Persianized to "Naw Bahara" after the Islamic conquest of Balkh. It is not known how long it continued to serve as a place of worship after the conquest. Accounts of early Arabs offer contradictory narratives.