Cikitsasarasangraha (Vangasena) 98.74

Cikitsāsārasaṅgraha (Vaṅgasena) 98.74

suvarṇamathavā rūpyaṃ yoge yatra na labhyate
tatra lauhena karmāṇi bhiṣakkuryādvicakṣaṇaḥ