 परिद्यूनं विषण्णं च स तमायान्तमब्रवीत्।।मोघं कर्तुं न शक्यं तु ब्राह्ममस्त्रं तदुच्यताम्। 
 Rama, you saw the crow in pain and despondency who returned to you and said that it is not possible to make Brahmas weapon ineffectual.You may tell now. what should be done.  