O King, the elephant and the crocodile fought in this way, pulling one another in and out of the water, for one thousand years. Upon seeing the fight, the demigods were very surprised.
Srimad Bhagavata Purana
श्रीमद्भागवतमहापुराणम्
मूल श्लोकः
नियुध्यतोरेवमिभेन्द्रनक्रयो- र्विकर्षतोरन्तरतो बहिर्मिथः । समाः सहस्रं व्यगमन् महीपते सप्राणयोश्चित्रममंसतामराः
niyudhyatorevamibhendranakrayo- rvikarṣatorantarato bahirmithaḥ | samāḥ sahasraṃ vyagaman mahīpate saprāṇayościtramamaṃsatāmarāḥ
SB 8.2.29