Rasarnava 11.63

11.63

koṣṇena kāñjikenādau kṣālitaṃ vastragālitam
pātre sukhoṣṇahastena yāvat śeṣaṃ vimardayet //

first washed with lukewarm sour gruel and filtered through a cloth, / one should rub in the vessel with a comfortably warm hand until it is finished.