Yamasmriti 3

Laghuyamasmṛti (99-verse version) 3

ṣaḍrātraṃ vā trirātraṃ vā yathāsaṃkhyaṃ samācaret /
snātvā triṣavaṇaṃ vipraḥ pañcagavyena śudhyati //