Genesis 18:9-12

The men said to him, “Where is Sarah your wife?” He said, “In the tent.” One of them said, “I’m coming back about this time next year. When I arrive, your wife Sarah will have a son.” Sarah was listening at the tent opening, just behind the man. Abraham and Sarah were old by this time, very old. Sarah was far past the age for having babies. Sarah laughed within herself, “An old woman like me? Get pregnant? With this old man of a husband?”