The children of Israel did that which was evil in the sight of Yahweh: and Yahweh delivered them into the hand of Midian seven years.
"This is the earliest instance of such a phenomenon of which we have record. The effective domestication of the camel had been accomplished somewhat earlier deep in Arabia and had now spread to tribal confederacies to the south and east of Palestine, giving them a mobility such as they had never had before." [Note: Bright, p. 158.] 