Srimad-Bhagavatam: Canto 10 - Chapter 1 - Verse 57

Sanskrit:

तत्र योगप्रभावेन नीत्वा सर्वजनं हरि: ।प्रजापालेन रामेण कृष्ण: समनुमन्त्रित: ।निर्जगाम पुरद्वारात् पद्ममाली निरायुध: ॥ ५७ ॥

ITRANS:

tatra yoga-prabhāvenanītvā sarva-janaṁ hariḥprajā-pālena rāmeṇakṛṣṇaḥ samanumantritaḥnirjagāma pura-dvārātpadma-mālī nirāyudhaḥ

Translation:

After transporting all His subjects to the new city by the power of His mystic Yoga-māyā, Lord Kṛṣṇa consulted with Lord Balarāma, who had remained in Mathurā to protect it. Then, wearing a garland of lotuses but bearing no weapons, Lord Kṛṣṇa went out of Mathurā by its main gate.

Purport:

Śrīla Viśvanātha Cakravartī quotes the following verses from Śrī Padma Purāṇa, Uttara-khaṇḍa, to describe how Lord Kṛṣṇa transferred the citizens from Mathurā to Dvārakā: “In the middle of the night, as the citizens of Mathurā slept, Lord Janārdana suddenly removed them from that city and placed them in Dvārakā. When the men awoke, they were all amazed to find themselves, their children and their wives sitting inside palaces made of gold.”