One verse

Bhagavad Gita 2.28

2.28

अव्यक्तादीनि भूतानि व्यक्तमध्यानि भारत | अव्यक्तनिधनान्येव तत्र का परिदेवना ||२-२८||

avyaktādīni bhūtāni vyaktamadhyāni bhārata . avyaktanidhanānyeva tatra kā paridevanā ||2-28||

avyakta-ādīni
in the beginning unmanifested
bhūtāni
all that are created
vyakta
manifested
madhyāni
in the middle
bhārata
O descendant of Bharata
avyakta
nonmanifested
nidhanāni
when vanquished
eva
it is all like that
tatra
therefore
kā
what
paridevanā
lamentation

All created beings are unmanifest in their beginning, manifest in their interim state, and unmanifest again when annihilated. So what need is there for lamentation?