SB 10.73.22

santanvantaḥ prajā-tantūn
 sukhaṁ duḥkhaṁ bhavābhavau
prāptaṁ prāptaṁ ca sevanto
 mac-cittā vicariṣyatha
Synonyms: 
santanvantaḥ — generating; prajā — of progeny; tantūn — lines; sukham — happiness; duḥkham — distress; bhava — birth; abhavau — and death; prāptam prāptam — as they are encountered; ca — and; sevantaḥ — accepting; mat-cittāḥ — with minds fixed on Me; vicariṣyatha — you should go about.
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.