Anandakanda 1.23.223

1.23.223

śoṣayettatpunarvastrairbaddhvā veṣṭyaṃ mṛdā dṛḍham /
śuṣkaṃ nirudhya mūṣāyāṃ pacedatha tuṣāgninā //

One should dry it, tie it again in cloths, and wrap it firmly with clay;
having sealed it dry inside a crucible, one should then cook it with a chaff fire,