Valmiki Ramayana Aranya Kanda Sarga 54 Shloka 8
Original Shlokaतिमिनक्रनिकेतं तु वरुणालयमक्षयम्।।3.54.8।। सरितां शरणं गत्वा समतीयाय सागरम्।
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तिमिनक्रनिकेतम् the abode of whales and crocodiles, अक्षयम् inexhaustible,सरितां शरणम् refuge of all rivers, वरुणालयम् abode Varuna, god of the sea, गत्वा having covered, सागरम् ocean, समतीयाय crossed.
Ravana soon crossed the refuge of rivers, the abode of Varuna, god of the sea, inexhaustible ocean, and the home for whales and crocodiles.