bhūta-grāmaḥ sa evāyaṁ bhūtvā bhūtvā pralīyate
rātryāgame ’vaśhaḥ pārtha prabhavatyahar-āgame||19|| 

Meaning : This group of living beings (bhūta-grāma) keeps taking birth again and again, and then dissolves at the arrival of Brahma’s night. Powerless, O Arjuna, they are born again at the coming of his day.