In The Epic of Gilgamesh, Shamhat has intimate knowledge about Gilgamesh's dreams:

"Before you even came from the uplands,
Gilgamesh in Uruk was seeing you in dreams..."

(The Epic of Gilgamesh; dialogue spoken by Shamhat.)

How does she know about Gilgamesh's dreams? Shamhat and Gilgamesh clearly know each other, but do they know each other well enough to discuss dreams?