Kaṭha Upaniṣad 1.18

1.18

triṇāciketas trayam etad viditvā ya evaṃ vidvāṃś cinute nāciketam /
sa mṛtyupāśān purataḥ praṇodya śokātigo modate svargaloke //

'He who knows the three Nâkiketa fires, and knowing the three, piles up the Nâkiketa sacrifice, he, having first thrown off the chains of death, rejoices in the world of heaven, beyond the reach of grief.'