Srimad Bhagavatam Canto 10, Chapter 51, Text 35

SB 10.51.35

evam sambhasito rajña
 bhagavan bhuta-bhavanah
pratyaha prahasan vanya
 megha-nada-gabhiraya
 
Translation: 
 
[Sukadeva Gosvami continued:] Thus addressed by the King, the Supreme Personality of Godhead, origin of all creation, smiled and then replied to him in a voice as deep as the rumbling of clouds.
Srimad Bhagavatam Canto 10, Chapter 51, Text 34
Srimad Bhagavatam Canto 10, Chapter 51, Text 36