Śatapatha Brāhmaṇa ("of a hundred paths") 4.6.7.2

4.6.7.2

imameva lokamṛcā jayati | antarikṣaṃ yajuṣā divameva sāmnā tasmādyasyaikā vidyānūktā syādanvevāpītarayornirmitaṃ vivakṣetemameva lokamṛcā jayatyantarikṣaṃ yajuṣā divameva sāmnā

By the Rik he conquers this world, by the Yagus the air, and by the Sâman the sky. Therefore whosoever has learnt one of these sciences, let him endeavour to learn also what is contained in the two others: by the Rik, forsooth, he conquers this world, by the Yagus the air, and by the Sâman the sky.