Srimad Bhagavatam Canto 10, Chapter 33, Text 38

 SB 10.33.38

brahma-ratra upavrtte
 vasudevanumoditah
anicchantyo yayur gopyah
 sva-grhan bhagavat-priyah
 
Translation: 
 
After an entire night of Brahma had passed, Lord Krsna advised the gopis to return to their homes. Although they did not wish to do so, the Lord’s beloved consorts complied with His command.
 
Purport: 
 
In the Bhagavad-gita (8.17) Lord Krsna explains, “By human calculation, a thousand ages taken together is the duration of Brahma’s one day. And such also is the duration of his night.” Thus one thousand ages entered within a single twelve-hour night when Lord Krsna performed His rasa dance. Srila Visvanatha Cakravarti compares this inconceivable impression of time to the fact that many universes fit neatly within the forty-mile range of earthly Vrndavana. Or one may consider that mother Yasoda could not encircle the small abdomen of child Krsna with numerous ropes, and that at another time He manifested many universes within His mouth. The transcendence of spiritual reality above and beyond mundane physics is concisely explained in Srila Rupa Gosvami’s Laghu-bhagavatamrta:
 
evam prabhoh priyanam ca
 dhamnas ca samayasya ca
avicintya-prabhavatvad
 atra kiñcin na durghatam
 
“Nothing is impossible for the Lord, His dear devotees, His transcendental abode or the time of His pastimes, for all these entities are inconceivably powerful.”
 
Srila Visvanatha Cakravarti further explains that the word vasudevanumoditah indicates that Lord Krsna advised the gopis, “To assure the success of these pastimes, you and I should keep them secret.” The word vasudeva, a name of Krsna, also indicates Lord Krsna’s plenary expansion who acts as the presiding Deity of consciousness. When the word vasudeva is understood in this context, the word vasudevanumoditah indicates that the presiding Deity of consciousness, Vasudeva, manifested embarrassment and fear of their elders within the gopis’ hearts, and therefore it was only with great reluctance that the young girls returned home.
Srimad Bhagavatam Canto 10, Chapter 33, Text 37
Srimad Bhagavatam Canto 10, Chapter 33, Text 39