1 Samuel 17:1-3

The Philistines drew up their troops for battle. They deployed them at Socoh in Judah, and set up camp between Socoh and Azekah at Ephes Dammim. Saul and the Israelites came together, camped at Oak Valley, and spread out their troops in battle readiness for the Philistines. The Philistines were on one hill, the Israelites on the opposing hill, with the valley between them.