Anandakanda 1.23.50

1.23.50

kākajaṅghāstvimāḥ sarvāḥ piṣṭvā mūṣāntare kṣipet /
pūrvoktavandhyāmukhyābhir aṣṭābhir mardayed rasam //

and kākajaṅghā—having crushed all these, one should place them inside the crucible. / One should grind mercury with the eight plants starting with sterile kārkoṭakī mentioned earlier.