Srimad Bhagavatam Canto 10, Chapter 20, Text 32

SB 10.20.32

evam nivasatos tasmin
 rama-kesavayor vraje
sarat samabhavad vyabhra
 svacchambv-aparusanila
 
Translation: 
 
While Lord Rama and Lord Kesava were thus dwelling in Vrndavana, the fall season arrived, when the sky is cloudless, the water clear and the wind gentle.
Srimad Bhagavatam Canto 10, Chapter 20, Text 30-31
Srimad Bhagavatam Canto 10, Chapter 20, Text 33