SB 11.31.24
nityam sannihitas tatra
bhagavan madhusudanah
smrtyasesasubha-haram
sarva-mangala-mangalam
Translation:
Lord Madhusudana, the Supreme Personality of Godhead, is eternally present in Dvaraka. It is the most auspicious of all auspicious places, and merely remembering it destroys all contamination.