The key duty of the herders is their responsibility (mas’ūliyya) for the herd. They must fulfill this task responsibly (mas’ūl) and trustworthily (ma’mūn) and must obey the trader. Their job qualifications are characterized by dedication (ijtihad), service (khidma), and fatigue (ti’ib).
-Footprints in the Sand: Recent Long Distance Camel Trade in the Libyan Desert, Meike Meerpohl, in Desert Road Archaeology in Ancient Egypt and Beyond, 2013
I take special note of that last qualification, Ti’ib, which Lane additionally gives in its verbal Form IV as, He Fatigued Another, Himself, and his Travelling Camels by Urging them Quickly and by Hard Journeying, and I can say from personal experience that there is nothing else like the Fatigue made by Hard Journeying by Camel.