Mbh 8.41.2a

"'"Then those two, viz., the swan and the crow, rose into the sky, challenging each other. Capable of going everywhere at will, the swan proceeded in one kind of motion, while the crow coursed in a hundred different kinds. And the swan flew and the crow also flew, causing each other to wonder (at his skill) and each speaking highly of his own achievements. Beholding the diverse kinds of flight at successive instants of time, the crows that were there were filled with great joy and began to caw more loudly. The swans also laughed in mockery, uttering many remarks disagreeable (to the crows). And they began to soar and alight repeatedly, here and there. And they began to come down and rise up from tree-tops and the surface of the earth. And they uttered diverse cries indicative of their victory. The swan, however, with that one kind of slow motion (with which he was familiar) began to traverse the skies. For a moment, therefore, O sire, he seemed to yield to the crow. The crows, at this, disregarding the swans, said these words: 'That swan amongst you which has soared into the sky, is evidently yielding'. Hearing these words, the (soaring) swan flew westwards with great velocity to the ocean, that abode of Makaras. Then fear entered the heart of the crow who became almost senseless at not seeing any island or trees whereon to perch when tired. And the crow thought within his heart as to where he should alight when tired, upon that vast expanse of water. The ocean, being as it is the abode of countless creatures, is irresistible. Dwelt in by hundreds of monsters, it is grander than space. Nothing can exceed it in depth, O Suta's son. Men know, O Karna, that the waters of the ocean are as limitless as space. For the extent of its waters, O Karna, what is a crow to it? The swan, having traversed a great distance in a moment, looked back at the crow, and (though capable) could not leave him behind.