Genesis 18:10

6Abraham hurried into the tent to Sarah, and said, “Quickly prepare three seahs of fine meal, knead it, and make cakes.”

7Abraham ran to the herd, and fetched a tender and good calf, and gave it to the servant. He hurried to dress it.

8He took butter, milk, and the calf which he had dressed, and set it before them. He stood by them under the tree, and they ate.

9They asked him, “Where is Sarah, your wife?” He said, “There, in the tent.”

10He said, “I will certainly return to you at about this time next year; and behold, Sarah your wife will have a son.” Sarah heard in the tent door, which was behind him.

11Now Abraham and Sarah were old, well advanced in age. Sarah had passed the age of childbearing.

12Sarah laughed within herself, saying, “After I have grown old will I have pleasure, my lord being old also?”

13The LORD said to Abraham, “Why did Sarah laugh, saying, ‘Will I really bear a child when I am old?’

14Is anything too hard for the LORD? At the set time I will return to you, when the season comes around, and Sarah will have a son.”