Srimad Bhagavatam Canto 10, Chapter 73, Text 22

SB 10.73.22

santanvantah praja-tantun
 sukham duhkham bhavabhavau
praptam praptam ca sevanto
 mac-citta vicarisyatha
 
Translation: 
 
As you live your lives, begetting generations of progeny and encountering happiness and distress, birth and death, always keep your minds fixed on Me.
Srimad Bhagavatam Canto 10, Chapter 73, Text 21
Srimad Bhagavatam Canto 10, Chapter 73, Text 23