Utnapishtim's The Epic Of Gilgamesh
Utnapishtim finishes his story to Gilgamesh and offers him the chance at immortality. Gilgamesh must stay awake for six days and seven nights as a trial and Gilgamesh fails. Utnapishtim's wife convinces him to be merciful. Gilgamesh is told of a plant at the bottom of the sea that will give him back his youth. Gilgamesh then ties stones to his feet for retrieval of the plant. Gilgamesh takes the plant back to Uruk to try on another person first. On his travels back to Uruk, Gilgamesh and the ferryman fall asleep. While asleep a snake steals the plant of youth away.