Kaushitakagrihyasutra 2.7.20

2.7.20

caritaṃ bho iti pratyukte paścādagneḥ prāṅmukhe sthite ahatena vāsasācāryaḥ pradakṣiṇaṃ mukhaṃ triḥ pariveṣṭya upariṣṭāddaśāḥ kṛtvā yathā na saṃbhraśyeta \20\

When he has replied, “It has been fulfilled, sir,” while [the student] stands west of the fire facing east, the preceptor, wrapping an unblemished cloth three times clockwise around his head, having placed the fringes on the top so that it will not slip down,