Gobhilagrihyasutra 2.1.13

2.1.13

atha janyānām eko dhruvāṇām apāṃ kalaśaṃ pūrayitvā, sahodakumbhaḥ prāvṛto vāgyato 'greṇā 'gniṃ parikramya dakṣiṇata udaṅmukho 'vatiṣṭhate;

Then one of the people who assist at the wedding, fills a cup with 'firm' water, and having walked with the water-pot round the fire on its front side, silent, wrapped in his robe, he stations himself to the south (of the fire), facing the north