2 Samuel 5:17-20

17But when the Philistines heard that they had anointed David king over Israel, all the Philistines came up to seek David; and David heard of it, and went down to the strong hold. 18The Philistines also came and spread themselves in the valley of Rephaim. 19And David enquired of the LORD, saying, Shall I go up to the Philistines? wilt thou deliver them into my hand? And the LORD said to David, Go up: for I will certainly deliver the Philistines into thy hand. 20And David came to Baalperazim, and David smote them there, and said, The LORD hath broken forth upon my enemies before me, as the breach of waters. Therefore he called the name of that place Baalperazim.1