Anandakanda 2.8.183

2.8.183

tataścottaravāruṇyāḥ pañcāṅgair golake kṣipet /
ruddhvā mūṣāṃ puṭe paktvā punaruddhṛtya golake //

And then one should place it within a ball made of the five parts of uttaravāruṇī;
having sealed it in a crucible and cooked it in a pit of burning cow dung cakes (puṭa), one extracts it again, puts it into a ball,