Srimad Bhagavatam Canto 10, Chapter 69, Text 37

SB 10.69.37

athovaca hrsikesam
 naradah prahasann iva
yoga-mayodayam viksya
 manusim iyuso gatim
 
Translation: 
 
Having thus seen this display of the Lord’s Yoga-maya, Narada mildly laughed and then addressed Lord Hrsikesa, who was adopting the behavior of a human being.
 
Purport: 
 
According to Srila Visvanatha Cakravarti, Narada fully understood the Lord’s omniscience, and thus when he saw the Lord trying to find out the mood of His ministers, moving about in disguise, Narada could not help laughing. But remembering the Lord’s supreme position, he somewhat constrained his laughter.
Srimad Bhagavatam Canto 10, Chapter 69, Text 36
Srimad Bhagavatam Canto 10, Chapter 69, Text 38