Chāndogya Upaniṣad 4.16.5

4.16.5

sa yathobhayapād vrajan ratho vā ubhābhyāṃ cakrābhyāṃ vartamānaḥ pratitiṣṭhaty evam asya yajñaḥ pratitiṣṭhati yajñaṃ pratitiṣṭhantaṃ yajamāno 'nu pratitiṣṭhati \
sa iṣṭvā śreyān bhavati \\416.5\

5. As a two-legged man walking, or a chariot proceeding with both wheels, is well supported, so his sacrifice is well supported. The institutor of the sacrifice is well supported after the sacrifice which is well supported. He becomes better off by having sacrificed.