Bṛhadāraṇyaka Upaniṣad ("Great Forest Teaching") 4.3.36

4.3.36

sa yatrāyamaṇimānaṃ nyeti jarayā vopatapatā vāṇimānaṃ nigacchati tadyathāmraṃ vaudumbaraṃ vā pippalaṃ vā bandhanātpramucyata evamevāyaṃ puruṣa emyo'ṅgebhyaḥ saṃpramucya punaḥ pratinyāyaṃpratiyonyādravati prāṇāyaiva

'And when (the body) grows weak through old age, or becomes weak through illness, at that time that person, after separating himself from his members, as an Amra (mango), or Udumbara (fig), or Pippala-fruit is separated from the stalk, hastens back again as be came, to the place from which he started, to (new) life.