|Easton's Bible Dictionary|
Cold, 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, 21). Probably the Wadyes Sheriah, south of Gaza.
Int. Standard Bible Encyclopedia
BESOR, THE BROOK
be'-sor, (nachal besor; Codex Alexandrinus, Bechor, Codex Vaticanus, Beana; 1 Samuel 30:9, 20, 21; Josephus, Ant, VI, xiv, 6): A torrent-bed (nachal) mentioned in the account of David's pursuit of the Amalekites. Thought to be Wady Ghazza, which enters the sea Southwest of Gaza.
Besor (3 Occurrences)
1 Samuel 30:9 So David went, he and the six hundred men who were with him, and came to the brook Besor, where those who were left behind stayed. (WEB KJV JPS ASV BBE DBY WBS YLT NAS RSV NIV)
1 Samuel 30:10 But David pursued, he and four hundred men; for two hundred stayed behind, who were so faint that they couldn't go over the brook Besor. (WEB KJV JPS ASV DBY WBS YLT NAS RSV)
1 Samuel 30:21 David came to the two hundred men, who were so faint that they could not follow David, whom also they had made to stay at the brook Besor; and they went forth to meet David, and to meet the people who were with him. When David came near to the people, he greeted them. (WEB KJV JPS ASV BBE DBY WBS YLT NAS RSV NIV)