Srimad Bhagavatam Canto 10, Chapter 51, Text 38

SB 10.51.38

kala-trayopapannani
 janma-karmani me nrpa
anukramanto naivantam
 gacchanti paramarsayah
 
Translation: 
 
O King, the greatest sages enumerate My births and activities, which take place throughout the three phases of time, but never do they reach the end of them.
Srimad Bhagavatam Canto 10, Chapter 51, Text 37
Srimad Bhagavatam Canto 10, Chapter 51, Text 39-40