Anandakanda 1.24.62

1.24.62

śulbe tāre ca khoṭo'yaṃ sahasrāṃśena vedhakaḥ /
<tṛtīyaḥ prakāraḥ>
gandhakena hate sūte mṛtalohāni vāhayet //

Upon copper and silver, this khoṭa is a transmuter in a thousandth part.
<The third method>
When quicksilver is killed by sulphur, one should introduce calcinated metals.