“When will he be as he was?” Dany demanded.
“When the sun rises in the west and sets in the east,” said Mirri Maz Duur. “When the seas go dry and mountains blow in the wind like leaves. When your womb quickens again, and you bear a living child. Then he will return, and not before.”
— Daenerys and Mirri Maz Duur, A Game of Thrones, by George R. R. Martin