SB 10.50.57
tatra yoga-prabhavena
nitva sarva-janam harih
praja-palena ramena
krsnah samanumantritah
nirjagama pura-dvarat
padma-mali nirayudhah
Translation:
After transporting all His subjects to the new city by the power of His mystic Yoga-maya, Lord Krsna consulted with Lord Balarama, who had remained in Mathura to protect it. Then, wearing a garland of lotuses but bearing no weapons, Lord Krsna went out of Mathura by its main gate.
Purport:
Srila Visvanatha Cakravarti quotes the following verses from Sri Padma Purana, Uttara-khanda, to describe how Lord Krsna transferred the citizens from Mathura to Dvaraka:
susuptan mathurayan tu
paurams tatra janardanah
uddhrtya sahasa ratrau
dvarakayam nyavesayat
prabuddhas te janah sarve
putra-dara-samanvitah
haima-harmya-tale vista
vismayam paramam yayuh
“In the middle of the night, as the citizens of Mathura slept, Lord Janardana suddenly removed them from that city and placed them in Dvaraka. When the men awoke, they were all amazed to find themselves, their children and their wives sitting inside palaces made of gold.”
Thus end the purports of the humble servants of His Divine Grace A.C. Bhaktivedanta Swami Prabhupada to the Tenth Canto, Fiftieth Chapter, of the Srimad-Bhagavatam, entitled “Krsna Establishes the City of Dvaraka.”