Job 1:3 - Matthew Poole's English Annotations on the Holy Bible

Camels in these parts were very numerous, as is manifest from Judges 7:12 1 Chronicles 5:21, and from the plain testimonies of Aristotle and Pliny, and very useful, and proper both for carrying of burdens in these hot and dry countries, as being able to endure thirst much better than other creatures, and for service in war. She-asses were preferred before he-asses, as serving for the same uses as they did, and for breeding and milk also; but he-asses also may be included in this expression, which is of the feminine gender, because the greatest part of them (from which the denomination is usually taken) were she-asses. The greatest, i.e. one of the richest. Of all the men of the east, to wit, that lived in those parts; such general expressions being commonly understood with such limitations.