Bhagavad Gita 2.28

अव्यक्तादीनि भूतानि व्यक्तमध्यानि भारत।अव्यक्तनिधनान्येव तत्र का परिदेवना ॥२.२८॥

avyaktādīni bhūtāni vyaktamadhyāni bhārataavyaktanidhanānyeva tatra kā paridevanā

Beings are unmanifest in their beginning, manifest in their middle state, O Arjuna, and unmanifest again in their end. What is there to grieve about?

गीता