Ayurveda
In Ayurveda, the story is that Dhanvantari, the Hindu god of Ayurveda, made himself into a human king by incarnation. He was king of Varanasi, and taught Ayurvedic medicine to a group of physicians. One of these physicians, named Sushruta, wrote the Sushruta Samhita (Sushruta's Compendium), an Ayurvedic text that has this story in it.