Bṛhadāraṇyaka Upaniṣad ("Great Forest Teaching") 4.2.4

4.2.4

tasya prācī dikprāñcaḥ prāṇā dakṣiṇā digdakṣiṇe prāṇāḥ pratīci dikprratyañcaḥprāṇā udīcī digudañcaḥ prāṇā ūrdhvā digūrdhvāḥ prāṇā avācī digavāñcaḥprāṇāḥ sarvā diśaḥ sarve prāṇāḥ sa eṣa neti netyātmāgṛhmo na hi gṛhyate'śīryo na hi śīryate'saṅgo nahi sajyate'sito na vyathate ga riṣyatyabhayaṃvai janaka prāpto'sīti hovāca yājñavalkyaḥ | sa hovāca jaṃnako vaideho'bhayaṃ tvā gacchatādyājñavalkya yo no bhagavannabhayaṃ vedayase namaste'stvime videhā ayamahamasmi

'His (the Taigasa's) Eastern quarter are the prânas (breath) which go to the East;
'His Southern quarter are the prânas which go to the South;
'His Western quarter are the prânas which go to the West;
'His Northern quarter are the prânas which go to the North;
'His Upper (Zenith) quarter are the prânas which go upward;
'His Lower (Nadir) quarter are the prânas which go downward;
'All the quarters are all the prânas. And he (the Âtman in that state) can only be described by No, no! He is incomprehensible, for he cannot be comprehended; he is undecaying, for he cannot decay; he is not attached, for he does not attach himself; he is unbound, he does not suffer, he does not perish. O Ganaka, you have indeed reached fearlessness,'--thus said Yâgñavalkya.
Then Ganaka said: 'May that fearlessness come to you also who teachest us fearlessness. I bow to you. Here are the Videhas, and here am I (thy slave).'

4.2.4.p1

iti caturthādhyāye dvitīyaṃ brāhmaṇam