Anandakanda 1.7.158

1.7.158

<grāhyalakṣaṇam>
etattritayasevābhirjāyate rogasaṃcayaḥ /
vahnisthitaṃ tu vajrābhraṃ vikārānnācaretkvacit //

<Characteristics of what is acceptable>
From the consumption of this triad an accumulation of diseases arises; / but vajra-mica, when placed in fire, never undergoes any alteration.