SB 10.52.13

alakṣyamāṇau ripuṇā
 sānugena yadūttamau
sva-puraṁ punar āyātau
 samudra-parikhāṁ nṛpa
Synonyms: 
alakṣyamāṇau — not being seen; ripuṇā — by Their enemy; sa — together; anugena — with his followers; yadu — of the Yadus; uttamau — the two most excellent; sva-puram — to Their own city (Dvārakā); punaḥ — again; āyātau — They went; samudra — the ocean; parikhām — having as its protective moat; nṛpa — O King.
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.