Srimad-Bhagavatam: Canto 10 - Chapter 1 - Verse 13
Sanskrit:
अलक्ष्यमाणौ रिपुणा सानुगेन यदूत्तमौ ।स्वपुरं पुनरायातौ समुद्रपरिखां नृप ॥ १३ ॥
ITRANS:
alakṣyamāṇau ripuṇāsānugena yadūttamausva-puraṁ punar āyātausamudra-parikhāṁ nṛpa
Translation:
Unseen by Their opponent or his followers, O King, those two most exalted Yadus returned to Their city of Dvārakā, which had the ocean as a protective moat.