Skandapurana 5.32.97

5.32.97

tataḥ kāle gate te'pi kṛtvā tīvraṃ mahattapaḥ ..
saṃprāptāḥ paramaṃ sthānaṃ jarāmaraṇavarjitam .. 97 ..

Then, as time passed, having performed severe and great austerity,
they reached the supreme realm, devoid of old age and death.