Anandakanda 2.1.100

2.1.100

punaḥ punaśca piṣṭvātha puṭaiḥ ṣaḍbhirviśudhyati /
<caturthaḥ prakāraḥ>
kṣaudrakṣīrāranālāśca aṣṭabhāgāḥ pṛthak pṛthak //

Grinding it again and again, it is purified through six pit kilns.
<The fourth method>
Honey, milk, and sour rice gruel: eight parts of each separately;