Genesis 18:1-13

Later, the LORD again appeared to Abraham near the great trees of Mamre. Abraham was sitting at the entrance of his tent during the hottest part of the day. He looked up and saw three men standing near him. When Abraham saw them, he ran from his tent to meet them. He bowed facedown on the ground before them and said, “Sir, if you think well of me, please stay awhile with me, your servant. I will bring some water so all of you can wash your feet. You may rest under the tree, and I will get some bread for you so you can regain your strength. Then you may continue your journey.” The three men said, “That is fine. Do as you said.” Abraham hurried to the tent where Sarah was and said to her, “Hurry, prepare twenty quarts of fine flour, and make it into loaves of bread.” Then Abraham ran to his herd and took one of his best calves. He gave it to a servant, who hurried to kill it and to prepare it for food. Abraham gave the three men the calf that had been cooked and milk curds and milk. While they ate, he stood under the tree near them. The men asked Abraham, “Where is your wife Sarah?” “There, in the tent,” said Abraham. Then the LORD said, “I will certainly return to you about this time a year from now. At that time your wife Sarah will have a son.” Sarah was listening at the entrance of the tent which was behind him. Abraham and Sarah were very old. Since Sarah was past the age when women normally have children, she laughed to herself, “My husband and I are too old to have a baby.” Then the LORD said to Abraham, “Why did Sarah laugh? Why did she say, ‘I am too old to have a baby’?