2 Samuel 5:22-24

22Once again, the Philistine soldiers came and they covered the ground in Rephaim valley.

23So David again asked the Lord what he should do. This time the Lord said, ‘Do not march straight towards them. Instead, go round behind them. Then attack them from the other side, where the poplar trees are.

24When you hear a noise in the tops of the trees like marching men, go quickly to attack them. Then you will know that the Lord has gone in front of you. He will knock down the Philistine army for you.’