Skandapurana 5.126.9

5.126.9

tvayā snānaṃ prakartavyaṃ supuṇye'tra jalāśaye ..
tato divya vapurbhūtvā yauvanena samanvitā.
bhaviṣyasi na saṃdehaḥ satyametanmayoditam .. 9 ..

a ritual ablution must be performed by you in this very holy reservoir of water. / Then, having assumed a celestial body endowed with youth, / you will become [so], there is no doubt; this spoken by me is true.