Kauṣītaki Upaniṣad 3.7.2

3.7.2

prajñe sarvavyāpinyāvaṅgīkṛtya saha hyotāvityādyuktaṃ, pūrvvaṃ na vācaṃ vijijñāsīteti karaṇaniṣedhaḥ kṛtaḥ, ante ca na mano vijijñāsīteti tasyaiva niṣedhaṃ kariṣyati, tenādyantābhyāmindriyaniṣedhaḥ sarvendriyopalakṣaṇārthaṃ, madhye paryāyāṣṭakena viṣayaṃ niṣedhati pūrvottarayorapi viṣayaniṣedhopalakṣaṇārthaṃ | na cātrānekendra indriyaprāye śarīrasya pāṭhāccharīramapīndriyamiti mantavyaṃ, karaṇatasya viṣayopalabdhau vivakṣitatvāt tasya ca bhogāyatanave'pi śarīre yathākathañcidapi sampādayituṃ suśakatvāt| athaivamapi prāyapāṭhāntyāgyaḥ | tarhi śarīraśabdena tvagindriyamastu | na caivaṃ sukhaduḥkhayorviṣayatvaṃ virudhyate, tābhyāmupalakṣitasya tajjanakasya sparśasyaiva kalpayituṃ śakyatvāt, evañca kalpanāgaurave'pi prāyapāṭho na bādhito bhavati | paryāyāṣṭakaviṣayaṃ niṣidhya tattadviṣayiṇa evāvagamyatvamāha, na gandhaṃ vijijñāsīta ghrātāraṃ vidyāt, na rūpaṃ vijijñāsīta rūpavidyaṃ vidyāt, na śabdaṃ vijijñāsīta śrotāraṃ vidyāt, nānnannarasaṃ vijijñāsītānnarasasya vijñātāraṃ vidyāt, na karma vijijñāsīta karttāraṃ vidyāt, na