Anandakanda 1.15.138

1.15.138

tasya mūtrapurīṣābhyāṃ śulbaṃ svarṇaṃ bhaveddhruvam /
<10. pathyākalpaḥ; pathyotpattiḥ>
athātaḥ sampravakṣyāmi pathyākalpam anūpamam //

From his urine and feces, copper certainly becomes gold.
<10. Regimen of Pathyā; Origin of Pathyā>
Now I shall declare the peerless regimen of pathyā,