Nafi ibn al-Harith bin Kalada al-Thaqafi (in Arabic نافع بن الحارث بن كلدة الثقفي ) (died 670 AD) was an Arab physician of the Banu Thaqif and was recommended by prophet Muhammad and treated Sa`d ibn Abi Waqqas, and when Abu Bakr was dying, he designated his illness as poisoning.
Trained in Yemen, he is reported to have written a book named Dialog in Medicine. He was the chief physician and teacher at the Academy of Gundishapur in Persia.
He was half brother of Nufay ibn al-Harith (also known as Abu Bakra bin Kalada al-Thaqafi at-Thaifi).
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