Anandakanda 2.4.25

2.4.25

<tāmrabhasma (2)>
pāṣāṇabhedimatsyākṣīdravair dviguṇagandhakam /
tāmrasya lepayet piṣṭiṃ ruddhvā gajapuṭe pacet //

<Calx of copper (2)>
With juices of pāṣāṇabhedī and matsyākṣī, one should smear a paste of copper / with double the sulfur, seal it, and cook it in an elephant-pit incineration.