Psalms 21:12
Therefore shalt thou make them turn their back, when thou shalt make ready thine arrows upon thy strings against the face of them. Therefore shalt thou make them turn their back, when thou shalt make ready thine arrows upon thy strings against the face of them.
The Lord makes His enemies turn their back and flee before Him. He does this when He makes ready His arrows upon His strings aimed directly against their face. Their flight is driven by fear as He prepares to strike them in anger and judgment.