Bhagavad Gita: Verse 2.13
देहिनोऽस्मिन्यथा देहे कौमारं यौवनं जरा ।
तथा देहान्तरप्राप्तिर्धीरस्तत्र न मुह्यति ॥ २-१३॥
dehino’sminyathā dehe kaumāraṃ yauvanaṃ jarā
tathā dehāntaraprāptirdhīrastatra na muhyati
Just as in this body the embodied (soul) passes into childhood, youth and old age, so also does he pass into another body; the firm man does not grieve at it.
dehīnaḥ = of the embodied; asmin = in this; yathā = as; dehe = in the body; kaumāraṃ = boyhood; yauvanaṃ = youth; jarā = old age; tathā = similarly; dehāntara = of transference of the body; prāptiḥ = achievement; dhīraḥ = the sober; tatra = thereupon; na = never; muhyati = is deluded.;