Srimad-Bhagavatam: Canto 3 - Chapter 1 - Verse 24
Sanskrit:
ततो निवृत्त: क्रीडिष्यन् गम्भीरं भीमनिस्वनम् ।विजगाहे महासत्त्वो वार्धिं मत्त इव द्विप: ॥ २४ ॥
ITRANS:
tato nivṛttaḥ krīḍiṣyangambhīraṁ bhīma-nisvanamvijagāhe mahā-sattvovārdhiṁ matta iva dvipaḥ
Translation:
After returning from the heavenly kingdom, the mighty demon, who was like an elephant in wrath, for the sake of sport dived into the deep ocean, which was roaring terribly.