And He said, "I will certainly return to you according to the time of life, and behold, Sarah your wife shall have a son." (Sarah was listening in the tent door which was behind him.)
Genesis 18:10
Surrounding context
18:9 Then they said to him, "Where is Sarah your wife?" So he said, "Here, in the tent."
18:10 And He said, "I will certainly return to you according to the time of life, and behold, Sarah your wife shall have a son." (Sarah was listening in the tent door which was behind him.)
18:11 Now Abraham and Sarah were old, well advanced in age; and Sarah had passed the age of childbearing.