Apastambagrihyasutra 1.1.22

1.1.22

ājyaṃ vilāpyāpareṇāgniṃ pavitrāntarhitāyāmājyasthālyāmājyaṃ nirupyodīco 'ṅgārānnirūhya teṣvadhiśritya jvalatā 'vadyutya dve darbhāgre pratyasya triḥ paryagni kṛtvodagudvāsyāṅgārānpratyūhyodagagrābhyāṃ pavitrābhyāṃ punarāhāraṃ trirutpūya pavitre anuprahṛtya \22\

He melts the Âgya, pours it, to the west of the fire, into the Âgya-pot, over which he has laid two purifiers, draws coals (out of the sacrificial fire) towards the mirth, puts (the Âgya) on them, throws light on it by means of a burning (grass-blade), throws two Darbha points into it, moves a firebrand round it three times, takes it from the fire towards the north, sweeps the coals back (into the fire), purifies (the Âgya) three times with two northward-pointed purifiers, moving them backward and forward, and throws the purifiers into the fire.