One verse

Srimad Bhagavatam 10.85.12

10.85.12

नश्वरेष्विह भावेषु तदसि त्वमनश्वरम् । यथा द्रव्यविकारेषु द्रव्यमात्रं निरूपितम् ॥ १२ ॥

naśvareṣv iha bhāveṣu tad asi tvam anaśvaram yathā dravya-vikāreṣu dravya-mātraṁ nirūpitam

naśvareṣu
subject to destruction
iha
in this world
bhāveṣu
among entities
tat
that
asi
are
tvam
You
anaśvaram
the indestructible
yathā
just as
dravya
of a substance
vikāreṣu
among the transformations
dravya-mātram
the substance itself
nirūpitam
ascertained

You are the one indestructible entity among all the destructible things of this world, like the underlying substance that is seen to remain unchanged while the things made from it undergo transformations.