Gilgamesh reaches Mashu, the twin-peaked mountain. Utnapishtim lives beyond that mountain, which is Gilgamesh's desired destination. However, the two scorpion monsters that guard the entrance to the passageway deny his request. After pleading with them, they allow him to enter the tunnel.
After battling the bull, Enkidu becomes sick and eventually dies. Gilgamesh is heart broken and weeps for weeks. He trades his royalties for animal skin and travels to the wild in search of Utnapishtim, the immortal Mesopotamian Noah. He hopes to ask him the secret to achieving immortality.
After warning and questioning him, Siduri, a veiled tavern keeper, directs Gilgamesh to Urshanabi, the ferryman. Gilgamesh aboards his boat and together, they travel across the sea and through the Waters of Death to Utnapishtim.
When Gilgamesh and Urshanabi reach Utnapishitm, he tells Gilgamesh the story of the flood, which resulted in his gift of immortality. Gilgamesh begins to ask about the gift, so Utnapishitm challenges Gilgamesh to stay awake for seven days.
If you think you can stay alive for eternity, surely you can stay awake for a week.
Gilgamesh accepts the challenge, however he doesn't last very long and immediately fails. Utnapishtim's wife places a single loaf of bread beside his head for every day that he is asleep.