Charak Samhita
यथा चाकालमरणं यथायुक्तं च भेषजम्। सिद्धिं यात्यौषधं येषां न कुर्याद्येन हेतुना ॥५१॥
cause of premature death, selection of treatment to achieve success, and the reason for not treating a particular patient -
english translation
yathA cAkAlamaraNaM yathAyuktaM ca bheSajam। siddhiM yAtyauSadhaM yeSAM na kuryAdyena hetunA ॥51॥
hk transliteration by Sanscript