Andrew Lang 
Tales of King Arthur 
classic version

King Arthur, accompanied by Merlin the magician, had left the comfort of the court to seek adventures. He had fought a hard battle with the tallest Knight in all the land, and though he struck hard and well, he would have been slain had not Merlin enchanted the Knight and cast him into a deep sleep, and brought the King to a hermit who had studied the art of healing, and cured all his wounds in three days. Then Arthur and Merlin waited no longer, but gave the hermit thanks and departed.