Anandakanda 1.4.455

1.4.455

tattulyaṃ nikṣipet tasmin dhamed evaṃ tu saptadhā /
kṣiptvā kṣiptvā ca daradaṃ syādbījaṃ rasarañjakam //

one should cast an equal amount into it, and blow it thus seven times,
casting cinnabar again and again; the seed becomes a colorer of mercury.