Kaṭha Upaniṣad 161

161

prastutavijñānastutyartham āha śrutiḥ -- nāciketaṃ naciketasā prāptaṃ nāciketaṃ mṛtyunā proktaṃ mṛtyuproktam idam ākhyānam upākhyānaṃ vallītrayalakṣaṇaṃ sanātanaṃ cirantanaṃ vaidikatvād uktvā brāhmaṇebhyaḥ śrutvā cācāryebhyo medhāvī brahmaiva loko brahmalokas tasmin brahmaloke mahīyata ātmabhūta upāsyo bhavatīty arthaḥ ///1,3.16 //

Shankara’s Commentary:
Com.—The sruti, for extolling the knowledge treated of, says: Nachiketam ] obtained by Nachiketas. Mrityuproktam ] told by Death. The story] contained in the three vallis. Old] of ancient date, being narrated in the Vedas. Repeating] to Brahmins. Hearing] from preceptors; world of Brahman ] world which is Brahman; attains glory] having become the atman, is fit to be worshipped.