Shatapatha Brahmana 8.7.1.22

8.7.1.22

viśvasmai prāṇāyāpānāya | vyānāyeti prāṇo vai viśvajyotiḥ sarvasmā u vā etasmai prāṇo viśvaṃ jyotiryaceti sarvaṃ jyotiryacetyetatsūryaste 'dhipatiriti sūryamevāsyā adhipatiṃ karoti sādayitvā sūdadohasādhivadati tasyokto bandhuḥ

'For all out-breathing, and off-breathing, and through-breathing,'--for the Visvagyotis is the breath, and breath, indeed, is (necessary) for everything here;--'bestow thou all the light!'--that is, 'bestow thou the whole (or every) light;'--'Sûrya is thine overlord,'--he thereby makes Sûrya (the sun) its overlord. Having 'settled' it, he pronounces the Sûdadohas on it: its (symbolical) meaning has been told.