Srimad-Bhagavatam: Canto 9 - Chapter 1 - Verse 21
Sanskrit:
इत्युक्त्वा नाहुषो जायां तदीयं पूरवे वय: ।दत्त्वा स्वजरसं तस्मादाददे विगतस्पृह: ॥ २१ ॥
ITRANS:
ity uktvā nāhuṣo jāyāṁtadīyaṁ pūrave vayaḥdattvā sva-jarasaṁ tasmādādade vigata-spṛhaḥ
Translation:
Śukadeva Gosvāmī said: After speaking in this way to his wife, Devayānī, King Yayāti, who was now free from all material desires, called his youngest son, Pūru, and returned Pūru’s youth in exchange for his own old age.