Charak Samhita
व्याध्यवस्थाविशेषान् हि ज्ञात्वा ज्ञात्वा विचक्षणः । तस्यां तस्यामवस्थायां चतुःश्रेयः प्रपद्यते ॥३७॥
The physician, who is keenly observing variations in disease stages in the patient, should know it (the disease) well and prescribe such a treatment that would be helpful in attaining the fourfold effect of therapeutics.
english translation
vyAdhyavasthAvizeSAn hi jJAtvA jJAtvA vicakSaNaH । tasyAM tasyAmavasthAyAM catuHzreyaH prapadyate ॥37॥
hk transliteration by Sanscript