As soon as you hear the sound of marching in the tops of the balsam trees, move quickly, because this will mean that the LORD has gone out before you to strike the camp of the Philistines.”
KJV
And let it be, when thou hearest the sound of a going in the tops of the mulberry trees, that then thou shalt bestir thyself: for then shall the LORD go out before thee, to smite the host of the Philistines.
ASV
And it shall be, when thou hearest the sound of marching in the tops of the mulberry-trees, that then thou shalt bestir thyself; for then is Jehovah gone out before thee to smite the host of the Philistines.