Kaṭha Upaniṣad 34

34

lokādim agniṃ tam uvāca tasmai yā iṣṭakā yāvatīr vā yathā vā /
sa cāpi tat pratyavadad yathoktam athāsya mṛtyuḥ punar āha tuṣṭaḥ ///1,1.15 //

15. Death told him the fire, the source of the worlds what altars (to be raised), how many and how, and Nachiketas repeated it all as explained. Then Death, being delighted, said to him again.