مسالك الابصار في ممالك الامصار 2.39

2.39

for the Sultan, and their pay from his dīwān. Whatever is assigned for that khān, malik, amīr or iṣbahsālār remains his own personal portion. The chamberlains, the office-holders and those charged with duties among the men of the sword are drawn from the khāns, maliks and amīrs, each rank having what suits it according to its measure. As for the iṣbahsālārs, none of them is deemed fit to be close to the Sultan; from them come only governors of a kind and those of like standing. A khān has ten thousand horsemen, a malik a thousand horsemen, an amīr a hundred horsemen, and the iṣbahsālārs fewer than that.