Swift, the southern boundary of the territory of Israel beyond Jordan, separating it from the land of Moab ([Deut. 3:8](/deut#Deut.3.8), [16](/deut#Deut.3.16)). This river (referred to twenty-four times in the Bible) rises in the mountains of Gilead, and after a circuitous course of about 80 miles through a deep ravine it falls into the Dead Sea nearly opposite Engedi. The stream is almost dry in summer. It is now called el-Mujeb. The territory of the Amorites extended from the Arnon to the Jabbok.