Khandogya-Upanishad: Fifth Prapathaka, Twentieth Khanda
1. “And he who offers the second oblation, should offer it to Vyana (back-breathing), saying Svaha. Then Vyana is satisfied,
2. “If Vyana is satisfied, the ear is satisfied, if the ear is satisfied, the moon is satisfied, if the moon is satisfied, the quarters are satisfied, if the quarters are satisfied, whatever is under the quarters and under the moon is satisfied. And through their satisfaction he (the sacrificer or eater) himself is satisfied with offspring, cattle, health, brightness, and Vedic splendour.