Gilgamesh, I shall tell a secret thing. It is a mystery of the gods
A Mystery of the Gods?!
There is a lovely flower below the ocean. Once you got the flower, eat it and you will gain your immortality you have long searched for
After Utnapishtim told him about the rose, He went into the ocean using two heavy rock and some rope. He went down to get the rose.
Two rocks and rope
Come here and see upon this marvelous flower I have found
After he got the rose, He wishes to give this flower of immortality to the elders of the city to make them look young again and then he eats the flower to also gain his youth and become immortal. He returns to the Urshanabi and together travels a long distance to Gilgamesh's home.
Zzzzz Wine and Women
After a couple of days, Gilgamesh felt tired and fell to sleep. While he was sleeping, a snake appears to seek the rose. It then got the rose and disappear into the sea.
After crying about losing this rose, he decided to go back to his city. He then craved the story of the flood to remember for his search for immortality.