Agniveshyagrihyasutra 1.2.3.7

1.2.3.7

atha śvobhūte etāmeva diśamupaniṣkramyāchadirdarśe 'gnimupasamādhāya paristīrya madantīradhiśritya pūrvāṃ śāntiṃ kṛtvā vayaḥ suparṇā iti visṛjya vāsa ādityamupatiṣṭhate udūyaṃ tamasaspari udutyaṃ citraṃ taccakṣurdevahitaṃ ya udagād iti \

Then on the morrow, having gone out in that very same direction to a place out of sight of roofs, having set up the fire, strewn [grass] around, set over the heating waters, and performed the preliminary pacification rite, having cast off the garment with [the verse]: 'The birds of fair wings' (vayaḥ suparṇāḥ), he worships the sun with: 'Upward from this darkness' (ud vayam tamasas pari), 'Up the bright [horses]' (ud u tyam), 'The brilliant [face]' (citram), 'That eye placed by the gods' (tac cakṣur devahitam), and 'He who has arisen' (ya udagāt).