The stream is the largest in the northern Negev, and together with its largest tributaries, the Grar and Beersheba streams, reaches as far as Sde Boker, Yeruham, Dimona and Arad/Tel Arad. In the Old Testament Besor was a ravine or brook in the extreme south-west of Judah, where 200 of David's men stayed behind because they were faint, while the other 400 pursued the Amalekites (1 Samuel 30:9-10, 30:21). Probably south of Gaza.