Rasaprakashasudhakara 5.13

5.13

svedayeddinamekaṃ tu kāṃjikena tathābhrakam
paścātkulatthaje kvāthe takre mūtre'tha vahninā //

One should steam mica for one day in sour gruel, / and then in a decoction of horsegram, in buttermilk, or in urine by means of fire;