Bhagavatapurana 10.1.5

10.1.5

pitāmahā me samare 'marañjayair devavratādyātirathais timiṅgilaiḥ /
duratyayaṃ kaurava-sainya-sāgaraṃ kṛtvātaran vatsa-padaṃ sma yat-plavāḥ //

5. — Of Him (Sri Krishna) who was my grandfather's raft to sail in and who turned, as small as the foot-print of a calf, the sea

of Kaurava forces, made impassable with the whales of the great warriors, namely Bhishma and others who vanquish the immortals in battle, and crossed it.