Chandogya Upanishad 2.7

prāṇeṣu pañcavidhaṃ parovarīyaḥ sāmopāsīta prāṇo hiṅkāraḥ vāk prastāvaḥ cakṣur udgīthaḥ śrotraṃ pratihāraḥ mano nidhanam parovarīyāṃsi vā etāni

Let a man meditate on the fivefold Sâman, which is greater than great, as the prânas (senses). The hinkâra is smell (nose), the prastâva speech (tongue), the udgîtha sight (eye), the pratihâra hearing (ear), the nidhana mind. These are one greater than the other.

parovarīyo hāsya bhavati parovarīyaso ha lokāñ jayati ya etad evaṃ vidvān prāṇeṣu pañcavidhaṃ parovarīyaḥ sāmopāste iti tu pañcavidhasya

What is greater than great belongs to him, nay, he conquers the worlds which are greater than great, who knowing this meditates on the fivefold Sâman, which is greater than great, as the prânas (senses).