Anandakanda 2.6.27

2.6.27

jambīrair āranālair vā piṣṭvā ruddhvā puṭe pacet /
svāṅgaśītaṃ punaḥ piṣṭvā viṃśatyaṃśe śilāmlake //

and having ground it with jambīra lime [juice] or fermented sour gruel, confines it and calcinates it in a puṭa.
When cold of its own accord, having ground it again with a twentieth part of realgar and sour liquid,