KAṬHA UPANISHAD · 2.1.3

येन रूपं रसं गन्धं शब्दान् स्पर्शाꣳश्च मैथुनान् ।
एतेनैव विजानाति किमत्र परिशिष्यते । एतद्वै तत् ॥ ३॥

yena rūpaṃ rasaṃ gandhaṃ śabdān sparśāꣳśca maithunān ।
etenaiva vijānāti kimatra pariśiṣyate । etadvai tat ॥ 3॥

By the Self one knoweth taste and form and smell, by the Self one knoweth sound and touch and the joy of man with woman; what is there left in this world of which the Self not knoweth? This is the thing thou seekest.