Besor in the Bible

1 Samuel 30:9-10 So David went, he and the six hundred men that were with him, and came to the brook Besor, where those that were left behind stayed. 10 But David pursued, he and four hundred men: for two hundred abode behind, which were so faint that they could not go over the brook Besor.
1 Samuel 30:21 And David came to the two hundred men, which were so faint that they could not follow David, whom they had made also to abide at the brook Besor: and they went forth to meet David, and to meet the people that were with him: and when David came near to the people, he saluted them.