One verse

Srimad Bhagavatam 3.7.37

3.7.37

तत्त्वानां भगवंस्तेषां कतिधा प्रतिसंक्रम: । तत्रेमं क उपासीरन् क उ स्विदनुशेरते ॥ ३७ ॥

tattvanam bhagavams tesam katidha pratisankramah tatremam ka upasiran ka u svid anuserate

tattvanam
of the elements of nature
bhagavan
O great sage
tesam
of them
katidha
how many
pratisankramah
dissolutions
tatra
thereupon
imam
unto the Supreme Lord
ke
who are they
upasiran
being saved
ke
who are they
u
who
svit
may
anuserate
serve the Lord while He sleeps.

Please describe how many dissolutions there are for the elements of material nature and who survives after the dissolutions to serve the Lord while He is asleep.