15 As soon as you hear the sound of marching in the tops of the poplar trees, move out to battle, because that will mean God has gone out in front of you to strike the Philistine army.”

Read 1 Chronicles 14:15 Using Other Translations

And it shall be, when thou shalt hear a sound of going in the tops of the mulberry trees, that then thou shalt go out to battle: for God is gone forth before thee to smite the host of the Philistines.
And when you hear the sound of marching in the tops of the balsam trees, then go out to battle, for God has gone out before you to strike down the army of the Philistines."
When you hear a sound like marching feet in the tops of the poplar trees, go out and attack! That will be the signal that God is moving ahead of you to strike down the Philistine army.”