Charak Samhita
बहुता तत्रयोग्यत्वमनेकविधकल्पना। सम्पच्चेति चतुष्कोऽयं द्रव्याणां गुण उच्यते ॥७॥
॥ Qualities of dravya (medicine)॥ Abundance (in availability), efficacy (with good pharmacological properties), various pharmaceutical forms and intact qualities of drugs – these are four qualities of the ideal medicine.
english translation
bahutA tatrayogyatvamanekavidhakalpanA। sampacceti catuSko'yaM dravyANAM guNa ucyate ॥7॥
hk transliteration by Sanscript