Note 13 — Chapter I · The Exodus of the Parsis
Ratanbai Ardeshir Vakil translation
Khorassan—A large country stretching from Iraq (Persian) to Azadwar (the chief town of the province of Djoueïn) and to Beïhaq. It is bounded on the side of India (on the south and east) by Thokharistan, Ghaznee, Sedjestan, and Kirman. It contains fine cities, such as Nisabour, Merve, which has been the capital of Balk, Herat, Thaleqan, Nesa, Abiwerd, Serakhs, and other large cities situate on this side of the river Oxus. Some geographers have placed the provinces of Kharezm and a part of Transoxiana in Khorassan, but that is an error.... When Islam appeared in the world, the Khorassanians, by a quite special favour of Providence, eagerly welcomed it. They accepted without opposition the peace offered them; hence they were subjected to a light tax only, and escaped being massacred or made prisoners. The conquest itself took place in the eighteenth year of the Hejira. ’Omar ben Khattab sent into Khorassan El-Ahnef ben Qaïs, who in a short time took possession successively of the two Thabés, Herat, Merv esch-Schahidjân and Nisabour, after having forced the Persian king Yezdezard, son of Schahriar, to take refuge in Transoxiana with the Khan of the Turks. (See B. de Meynard, Dict. geog., hist., &c., p. 197.)