Kural - 495

The crocodile prevails in its own flow of water wide,
If this it leaves, 'tis slain by anything beside

Explanation
In deep water, a crocodile will conquer (all other animals); but if it leave the water, other animals will conquer it.

Tamil Transliteration
Netumpunalul Vellum Mudhalai Atumpunalin
Neengin Adhanaip Pira.