One verse

Bhagavad Gita 2.30

2.30

देही नित्यमवध्योऽयं देहे सर्वस्य भारत | तस्मात्सर्वाणि भूतानि न त्वं शोचितुमर्हसि ||२-३०||

dehī nityamavadhyo.ayaṃ dehe sarvasya bhārata . tasmātsarvāṇi bhūtāni na tvaṃ śocitumarhasi ||2-30||

dehī
the owner of the material body
nityam
eternally
avadhyaḥ
cannot be killed
ayam
this soul
dehe
in the body
sarvasya
of everyone
bhārata
O descendant of Bharata
tasmāt
therefore
sarvāṇi
all
bhūtāni
living entities (that are born)
na
never
tvam
you
śocitum
to lament
arhasi
deserve

O descendant of Bharata, he who dwells in the body can never be slain. Therefore you need not grieve for any living being.