Aitareya Upaniṣad 3.1.2

3.1.2

yena vā paśyati yena vā śṛṇoti yena vā gandhāñ jighrati yena vā vācaṃ vyākaroti yena vā svādu cāsvādu ca vijānāti.
yad etad dhṛdayaṃ manaś caitat.
sañjñānam ājñānaṃ vijñānaṃ prajñānaṃ medhā dṛṣṭir dhṛtir matir manīṣā jūtiḥ smṛtiḥ saṅkalpaḥ kratur asuḥ kāmo vaśa iti sarvāṇy evaitāni prajñānasya nāmadheyāni bhavanti.

All these, indeed, are appellations of intelligence (prajñāna).

1. [Question:] Who is this one? [Answer:] We worship him as the Self (Ātman). [Question:] Which one is the Self? [Answer:] [He] whereby one sees, or whereby one hears, or whereby one smells odors, or whereby one articulates speech, or whereby one discriminates the sweet and the unsweet; that which is heart (hṛdaya) and mind (manas)—that is, consciousness (saṃjñāna), perception (ājñāna), discrimination (vijñāna), intelligence (prajñāna), wisdom (medhas), insight (dṛṣṭi), steadfastness (dhṛti), thought (mati), thoughtfulness (manīṣā), impulse (jūti), memory (smṛti), conception (saṃkalpa), purpose (kratu), life (asu), desire (kāma), will (vaśa).