Bhagavad Gita 2.27

जातस्य हि ध्रुवो मृत्युर्ध्रुवं जन्म मृतस्य च।तस्मादपरिहार्येऽर्थे न त्वं शोचितुमर्हसि ॥२.२७॥

jātasya hi dhruvo mṛtyurdhruvaṃ janma mṛtasya catasmādaparihārye’rthe na tvaṃ śocitumarhasi

For the born, death is certain, and for the dead, birth is certain; therefore, you should not grieve over the inevitable.

गीता