Kural - 948

Disease, its cause, what may abate the ill:
Let leech examine these, then use his skill

Explanation
Let the physician enquire into the (nature of the) disease, its cause and its method of cure and treat it faithfully according to (medical rule).

Tamil Transliteration
Noinaati Noimudhal Naati Adhudhanikkum
Vaainaati Vaaippach Cheyal.