SB 8.2.29
niyudhyator evam ibhendra-nakrayor
vikarsator antarato bahir mithah
samah sahasram vyagaman mahi-pate
sapranayos citram amamsatamarah
Translation by His Divine Grace A. C. Bhaktivedanta Swami Srila Prabhupada:
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.