Anandakanda 2.7.85

2.7.85

viṃśatyaṃśena daradaṃ stanyaiḥ saṃmardayed dinam /
tatastatsampuṭe ruddhvā bhūdhare tu puṭaṃ laghu //

cinnabar in a twentieth part, and grind it with breast milk for a day. / Then, sealing it in a pair of crucibles, [one should give it] a mild incineration in a subterranean apparatus.