Agniveshyagrihyasutra 1.1.1.9

1.1.1.9

darvīṃ kūrcamājyasthālīṃ praṇītāpraṇayaṃ yena cānyāni prokṣyate tacca sakṛdevasarvāṇi yathopapadaṃ vā etasmin kāle brahmā yajñopavītaṃ kṛtvāpa ācamyāpareṇāgniṃ dakṣiṇātikramya brahmāsanāt tṛṇaṃ nirasyaāpa upaspṛśyāgnimabhimukhamupaviśati \

The ladle, the grass bunch, the ghee pot, the vessel for bringing forward the holy water, and whatever else is used to sprinkle other items—either all at once or in the order of occurrence. At this time the Brahman priest, having put on the sacred thread, having sipped water, having stepped around to the south by the west of the fire, having tossed away a blade of grass from the seat of the Brahman priest, [and] having touched water, sits down facing the fire.