Śatapatha Brāhmaṇa ("of a hundred paths") 4.6.7.14

4.6.7.14

yatra vai devāḥ | imā vidyāḥ kāmānduduhre taddha yajurvidyaiva bhūyiṣṭhānkāmānduduhe sā nirdhītatamevāsa sā netare vidya pratyāsa nāntarikṣaloka itarau lokau pratyāsa

Now when the gods milked (the objects of) their wishes from these sciences, the Yagus science milked most wishes. It became, as it were, emptied the most; it was not equal to the other two sciences,--the air-world was not equal to the two other worlds.