Anandakanda 1.1.26

1.1.26

aṣṭādaśabhiratyantaṃ śuddhaḥ siddhiprado drutam /
rasāvatāraṃ yo vetti sa tu dhārmikasattamaḥ //

Completely purified through the eighteen [processes], it swiftly grants alchemical perfection. / He who knows the descent of mercury is the best among the righteous;