Kaṭha Upaniṣad 1.12

1.12

svarge loke na bhayaṃ kiṃcanāsti na tatra tvaṃ na jarayā bibheti /
ubhe tīrtvā aśanāyāpipāse śokātigo modate svargaloke //

[Naciketas :] 12. In the heavenly world is no fear whatsoever. Not there art thou. Not from old age does one fear. Over both having crossed—hunger, and thirst too— Gone beyond sorrow, one rejoices in the heaven-world. 13. Thyself, O Death, understandest the heavenly fire. Declare it to me who have faith (śraddadhāna). Heaven-world people partake of immortality. This I choose with boon the second.