The Compendium of Kāśyapa 3.7.6.p1

3.7.6.p1

atha śuddhasnātāṃ striyaṃ caturthe'hani snānagṛhe śvetena evā'nyena vāsasā'vaguṇṭhyānavalokayantī śucirdevagṛhaṃ praviśyodghaṭāgniṃ prajvalantaṃ

Now, on the fourth day, the woman, having bathed after purification, veiled in the bathing chamber with a different, white garment, looking at nothing else, pure, having entered the sanctuary and facing the blazing, open fire,