Bhagavad Gita 2.13

देहिनोऽस्मिन्यथा देहे कौमारं यौवनं जरा।तथा देहान्तरप्राप्तिर्धीरस्तत्र न मुह्यति ॥२.१३॥

dehino’sminyathā dehe kaumāraṃ yauvanaṃ jarātathā dehāntaraprāptirdhīrastatra na muhyati

Just as the embodied soul passes through childhood, youth, and old age in this body, so too does it pass into another body; the steadfast one does not grieve over this.

गीता