Anandakanda 1.24.13

1.24.13

tadbhasma melayetsūte samabhāgaṃ vicakṣaṇaḥ /
cārayedrajataṃ sūte hayamūtreṇa mardayet //

The wise man should mix that ash in equal parts into quicksilver.
One should digest silver into the quicksilver, and grind it with horse urine.