Katha Upanishad - Verse 1.1.12
Text: स्वर्गे लोके न भयं किंचनास्ति न तत्र त्वं न जरया बिभेति । उभे तीर्त्वाशनायापिपासे शोकातिगो मोदते स्वर्गलोके ॥ १२ ॥ svarge loke na bhayaṃ kiṃcanāsti na tatra tvaṃ na jarayā bibheti | ubhe tīrtvāśanāyāpipāse śokātigo modate svargaloke || 12 || 12. (Nachiketas says) In heaven there is no fear. You are not there; nor there do they in old age fear. Having crossed both hunger and thirst, one in heaven rejoices being above grief....