Kauṣītaki (Śāṅkhāyana) Brāhmaṇa 25.5.1

25.5.1

dyaur na ya indra abhi bhūma arya.(.bhūmārya.).iti traiṣṭubham indraḥ kutsāya sūryasya sātāv iti sūryavat / (soma: viṣuvat)

xxv. 6. ‘As the sky surpasseth the earth, O Indra, that which our foes’ is (the hymn) in Triṣṭubh, containing (the word) ‘sun’ in ‘Indra to Kutsa in the winning of the sun’; this is a symbol of this day. If they do not (perform it) on its own basis, ‘Turning as it were to the sun’ is the