Anandakanda 2.2.24

2.2.24

ādāya peṣayedamle mṛtanāgaṃ cāṣṭamāṃśakam /
pacedgajapuṭe ruddhvā pūrvavannāgasaṃyutam //

Taking it out, one should grind incinerated lead, an eighth part, in sour liquid,
and cook it sealed in an elephant pit, combined with lead as before.