Praśna Upaniṣad ("Six Questions") 3.11

3.11

ya evaṃ vidvānprāṇaṃ veda
na hāsya prajā hīyate'mṛto bhavati tadeṣa ślokaḥ

11. The knower who knows life (*prāṇa*) thus—his offspring truly is not lost; he becomes immortal. As to this there is this verse (*śloka*):— 12. The source, the entrance, the location, The fivefold extension, And the relation to self (*adhyātma*) of the life (*prāṇa*)— By knowing these one obtains immortality! By knowing these one obtains immortality!