Jaiminīya Upaniṣad Brāhmaṇa 4.26

Mind is a hell; speech is a hell; breath is a hell; the eye is a hell; the ear is a hell; the skin is a hell; the two hands are a hell; the rectum is a hell; the penis is a hell; the two feet are a hell.

‘With the mind I know things to be investigated’—thus he knows.

‘With speech I know tastes’—thus he knows.

‘With breath I know odors’—thus he knows.

‘With the eye I know forms’—thus he knows.

‘With the ear I know sounds’—thus he knows.

‘With the skin I know sensations of touch’—thus he knows.

‘With the two hands I know actions’—thus he knows.

‘With the belly I know hunger’—thus he knows.

‘With the penis I know pleasures’—thus he knows.

‘With the two feet I know paths’—thus he knows.

A span’s length north of Plakṣa Prāsravaṇa: that is the center of the earth.
Now where these Seven Seers are: that is the center of heaven.

Now where these saline tracts are: that is the heart of the earth.
Now that which is dark in the Moon: that is the heart of heaven.

Whoever knows these two centers and two hearts of heaven and earth thus, does not depart from this world unsatisfied.

Homage to the transcendent sāman, to Aitureta, to Dhṛtarāṣṭra Pārthuśravasa! And those who guard the breath, let them guard me!
Well-being!
‘Action’—such is the Gārhapatya; ‘quietude’—such is the Āhavanīya; ‘self-restraint’—such is the Anvāhāryapacana.
Fifth khaṇḍa in the eleventh anuvāka.
The eleventh anuvāka is completed.