1 Chronicles 14:15

As soon as you hear the sound of marching in the tops of the balsam trees, move out to battle, because this will mean that God has marched out before you to strike the camp of the Philistines.”
BSB · Berean Standard Bible
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.
KJV · King James Version
When you hear the sound of marching in the tops of the mulberry trees, then go out to battle; for God has gone out before you to strike the army of the Philistines.”
WEB · World English Bible
And it shall be, when thou hearest the sound of marching in the tops of the mulberry-trees, that then thou shalt go out to battle; for God is gone out before thee to smite the host of the Philistines.
ASV · American Standard Version

Related passages

From the Treasury of Scripture Knowledge, grouped by the word they explain.

when thou shalt hear
Some, taking the word {bechaïm,} translated "mulberry trees," as a proper name, render, "when thou shalt hear a sound of going upon the summits of Bechaïm;" other understanding {rosh,} "a top," in the sense of beginning or entrance, read, "when thou hearest a sound of footsteps at the entrance of the grove of mulberry trees;" and others think a rustling among the leaves is intended. The Targumist read, "When thou shalt hear the sound of the angels coming to thy assistance, then go out to battle; for an angel is sent from the presence of God, that he may render thy way prosperous." If there had not been an evident supernatural interference, David might have thought that the {ruse de guerre} which he had used, was the cause of his victory.
Leviticus 26:36; 2 Kings 7:6; 2 Kings 19:7; Acts 2:2
then thou
Judges 4:14; Judges 7:9, 15; 1 Samuel 14:9–22; Philippians 2:12, 13
for God
Isaiah 13:4; Isaiah 45:1, 2; Micah 2:12, 13