Mahabharata 9.50.26

9.50.26

na copalebhe bhagavāñśakraḥ praharaṇaṃ tadā |
yadvai teṣāṃ bhavedyogyaṃ vadhāya vibudhadviṣām || 26 ||

Meanwhile, on the occasion of a war between the gods and the danavas, Shakra wandered through the three worlds in search of weapons. The great god, however, failed to find such weapons as were fit to slay the foes of the celestials. Shakra then said unto the gods. 'The great asuras are incapable of being dealt with by me! Indeed, without the bones of Dadhica, our foes could not be slain! Ye best of celestials, repair, therefore, to that foremost of rishis and solicit him, saying, "Grant us, O Dadhica, thy bones! With them we will slay our foes!"