Genesis 18:8-10 World English Bible (WEB)
8 He 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.
9 They asked him, “Where is Sarah, your wife?”
He said, “There, in the tent.”
10 He 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.
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.