स होवाच । विजानाम्य् अहं यत् प्राणो ब्रह्म । कं च तु खं च न विजानामीति । ते होचुः । यद् वाव कं तद् एव खम् । यद् एव खं तद् एव कम् इति । प्राणं च हास्मै तद् आकाशं चोचुः
sa hovāca | vijānāmy ahaṃ yat prāṇo brahma | kaṃ ca tu khaṃ ca na vijānāmīti | te hocuḥ | yad vāva kaṃ tad eva kham | yad eva khaṃ tad eva kam iti | prāṇaṃ ca hāsmai tad ākāśaṃ cocuḥ
Devanagari rendered by HREEM from the edition's roman (IAST) text; the IAST is the edition's own.
'Breath is Brahman, Ka (pleasure) is Brahman, Kha (ether) is Brahman.' He said: 'I understand that breath is Brahman, but I do not understand Ka or Kha.' They said: 'What is Ka is Kha, what is Kha is Ka.' They therefore taught him Brahman as breath, and as the ether (in the heart).
Translated by F. Max Müller