Srimad Bhagavatam Canto 10, Chapter 51, Text 37

SB 10.51.37

kvacid rajamsi vimame
 parthivany uru-janmabhih
guna-karmabhidhanani
 na me janmani karhicit
 
Translation: 
 
After many lifetimes someone might count the dust particles on the earth, but no one can ever finish counting My qualities, activities, names and births.
Srimad Bhagavatam Canto 10, Chapter 51, Text 36
Srimad Bhagavatam Canto 10, Chapter 51, Text 38