in the abbasid era, chieftainship (niqābat) was a politico-religious institution with social functions. since the early periods of the samanids era, the alavids’ chieftainship in nayshābūr, capital of khurāsān, had been turned over to the ḥusaynī alavids of banū zubāra, but amīr nūḥ b. manṣūr sāmānī (ruled 366-378) handed over this post to a ḥasanī alavid, whose descendants became the hereditar...