Valmiki Ramayana Kishkindha Kanda Sarga 13 Shloka 10

तटाकवैरिणः destroyers of tanks, शुक्लदन्तविभूषितान् adorned with white tusks, घोरान् terrific, एकचरान् wandering alone, कूलघातिनः destroyers of the banks, द्विरदान् elephants (those that have two tusks).

Observing terrific elephants adorned with white tusks wandering alone destroying the tanks, shattering the banks.