Anandakanda 2.1.245

2.1.245

<kharparīśuddhiḥ>
rajasvalārajomūtrai rasakaṃ bhāvayeddinam /
taireva dinamekaṃ tu mardayecchuddhimāpnuyāt //

<Purification of calamine>
One should steep rasaka for a day in the menstrual blood and urine of a menstruating woman;
one should grind it with those very [substances] for one day, and it will attain purity.