Agniveshyagrihyasutra 3.6.3.27

3.6.3.27

apaḥ sacelā dakṣiṇāmukhāḥ samṛttikāḥ plavante dhātā punātu savitā punātu iti \

Clothed in their garments, facing south, with clay, they bathe in the water, [saying]: “May Dhātṛ purify [us], may Savitṛ purify [us]!”