One verse

Bhagavad Gita 2.27

2.27

जातस्य हि ध्रुवो मृत्युर्ध्रुवं जन्म मृतस्य च | तस्मादपरिहार्येऽर्थे न त्वं शोचितुमर्हसि ||२-२७||

jātasya hi dhruvo mṛtyurdhruvaṃ janma mṛtasya ca . tasmādaparihārye.arthe na tvaṃ śocitumarhasi ||2-27||

jātasya
of one who has taken his birth
hi
certainly
dhruvaḥ
a fact
mṛtyuḥ
death
dhruvam
it is also a fact
janma
birth
mṛtasya
of the dead
ca
also
tasmāt
therefore
aparihārye
of that which is unavoidable
arthe
in the matter
na
do not
tvam
you
śocitum
to lament
arhasi
deserve

One who has taken his birth is sure to die, and after death one is sure to take birth again. Therefore, in the unavoidable discharge of your duty, you should not lament.