Anandakanda 1.13.19

1.13.19

mṛdvagninā tu tatpaktvā hyajākṣīre vinikṣipet /
gokṣīrājyaiḥ kiṃcidūnaṃ sthālyā vaktraṃ tu bandhayet //

Having cooked it over a gentle fire, one should cast it into goat's milk. / One should tie the mouth of an earthen pot somewhat short of full with cow's milk and clarified butter