Anandakanda 2.1.178

2.1.178

evaṃ gokṣīramadhyasthaṃ sthāpyaṃ peṣyaṃ puṭe pacet /
paścādamlaiśca gokṣīraiḥ kārpāsaiśca punaḥ punaḥ //

In this way, [the mica] should be placed in cow's milk, ground, and roasted in an incineration pit; / thereafter, repeatedly with sour liquids, cow's milk, and cotton [plant juice],