Bhagavad Gita: Chapter 2, Verse 13

देहिनोऽस्मिन्यथा देहे कौमारं यौवनं जरा ।
तथा देहान्तरप्राप्तिर्धीरस्तत्र न मुह्यति ॥ २-१३ ॥

dehino ’smin yathā dehe kaumāraṁ yauvanaṁ jarā
tathā dehāntara-prāptir dhīras tatra na muhyati 2.13

Just as embodied soul continuously passes in this body from childhood to youth to old age, Similarly the soul passes into another body at the time of death. An intelligent person is not bewildered by such a change.