The Valley of Rephaim was a valley near Jerusalem on the southwest and west-southwest side of the city, along the route toward Bethlehem. It was occupied by the Philistines during their conflicts with David.
After receiving divine direction, David attacked and defeated the Philistines in the valley. When they rallied there again, he was warned by a divine oracle to attack from Gibeon, gaining a second victory and pursuing them toward Gezer.
The valley is now called el-Bukei’a. Its location near Jerusalem made it an important position controlling communication between Bethlehem and Jerusalem.