Kauṣītaki Upaniṣad 3.3.12

3.3.12

atha khalu prāṇa eva prajñātmā [idaṃ śarīraṃ parigṛhyotthāpayati /

3. One lives with speech gone, for we see the dumb; one lives with eye gone, for we see the blind; one lives with ear gone, for we see the deaf; one lives with mind gone, for we see the childish; one lives with arms cut off, one lives with legs cut off, for thus we see. But now it is the breathing spirit (_prāṇa_), even the intelligential self (_prajñātman_), that seizes hold of and animates (_ut-thā_) this body. This, therefore, one should reverence as the Uktha.