The territory occupied by Moab at the period of its greatest extent, before the invasion of the Amorites, divided itself naturally into three distinct and independent portions: the enclosed corner or canton south of the Arnon, referred to in the Bible as "field of Moab" (Ruth ). The more open rolling country north of the Arnon, opposite Jericho and up to the hills of Gilead, called the "land of Moab" (Deuteronomy ) and the district below sea level in the tropical depths of the Jordan valley (Numbers ).