Anandakanda 1.23.315

1.23.315

vajrabhasma hemabhasma tadvā ekatra bandhayet /
<anye kulamūlikākalpāḥ>
niśācararase jāryaṃ narajīvena jārayet //

Or one binds diamond ash and gold ash together in one place. / <Other Procedures of Family Roots> / It is to be digested in the juice of niśācara, and one should digest it with human essence.