Then Mátali to Ráma cried: “Let other arms the day decide. Why wilt thou strive with useless toil And see his might thy efforts foil? Launch at the foe thy dart whose fire Was kindled by the Almighty Sire.”

In plain words: Matali, the driver of the chariot sent by the gods, tells Rama to stop wasting effort with ordinary weapons against Ravana. He urges Rama to use the special arrow made by Brahma, the Creator.