Gobhilagrihyasutra 3.8.5

3.8.5

pṛṣātakaṃ pradakṣiṇam agniṃ paryāṇīya, brāhmaṇān avekṣayitvā svayam avekṣeta: tac cakṣur devahitaṃ purastāc chukram uccarat; paśyema śaradaḥ śataṃ, jīvema śaradaḥ śatam iti.

Having carried the Prishâtaka around the fire, turning his right side towards (the fire), and having caused the Brâhmanas to look at it (i.e. at the Prishâtaka), he should look at it himself with (the verse repeated by the Brâhmanas and by the-sacrificer), 'That bright eye, created by the gods, which rises on the east—may we see it a hundred autumns; may we live a hundred autumns!'