Genesis 18:8-10 New Revised Standard Version (NRSV)
8 Then he took curds and milk and the calf that he had prepared, and set it before them; and he stood by them under the tree while they ate.
9 They said to him, “Where is your wife Sarah?” And he said, “There, in the tent.” 10 Then one said, “I will surely return to you in due season, and your wife Sarah shall have a son.” And Sarah was listening at the tent entrance behind him.
Genesis 18:8-10 New International Version (NIV)
8 He then brought some curds and milk and the calf that had been prepared, and set these before them. While they ate, he stood near them under a tree.
9 “Where is your wife Sarah?” they asked him.
“There, in the tent,” he said.
10 Then one of them said, “I will surely return to you about this time next year, and Sarah your wife will have a son.”
Now Sarah was listening at the entrance to the tent, which was behind him.