Khandogya-Upanishad: Fifth Prapathaka, Twenty-First Khanda

1. “And he who offers the third oblation, should offer it to Apana (down-breathing), saying Svaha. Then Apana is satisfied. If Apana is satisfied, the tongue is satisfied, if the tongue is satisfied, Agni (fire) is satisfied, if Agni is satisfied, the earth is satisfied, if the earth is satisfied, whatever is under the earth and under fire is satisfied.

2. “And through their satisfaction he (the sacrificer or eater) himself is satisfied with offspring, cattle, health, brightness, and Vedic splendour.