Note 212 — Chapter XIII · Decline of the Caliphs’ Authority in Khorāsān. The Tāhirides

Vambéry (Bokhara, p. 55) notes that “the fact that Sāmān, whilst still a heretic, had held a command long after the Arab conquest, proves the small progress Islāmism had at first made among the followers of Zoroaster.”