2 Samuel 5:17-21

17The Philistines heard the news that David had now become king over Israel. So their whole army went to look for him to catch him. When David heard about this, he went out of the city to a strong, safe place.

18The Philistine soldiers arrived at Rephaim valley. They covered all the ground there.

19So David asked the Lord, ‘Should I go and attack the Philistines? Will you put them under my power?’ The Lord answered him, ‘Yes, go and attack the Philistines. I will certainly help you to win against them.’

20So David went to Baal Perazim. He won the fight against the Philistines in that place. He said, ‘The Lord has swept away my enemy like a flood of water.’ So they called that place ‘Baal Perazim’.

21When the Philistines ran away from there, they did not take their idols with them. So David and his men took them away.