Jaiminīya Upaniṣad Brāhmaṇa 2.1.9

2.1.9

te cakṣuṣodgātrādīkṣanta
sa yad eva cakṣuṣā paśyati tad ātmana āgāyad atha ya itare kāmās tān devebhyaḥ /

They consecrated themselves with sight as the udgātṛ. Whatever one sees with sight, that he sang for himself, but whatever other desires there were, those [he sang] for the gods.