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Birth of Isaac Promised
2When he raised his eyes and looked, behold, three men were standing opposite him; and when he saw them, he ran from the tent door to meet them and bowed down to the ground, 3and said, “My Lord, if now I have found favor in Your sight, please do not pass Your servant by. 4Please let a little water be brought and wash your feet, and make yourselves comfortable under the tree; 5and I will bring a piece of bread, so that you may refresh yourselves; after that you may go on, since you have visited your servant.” And they said, “So do as you have said.” 6So Abraham hurried into the tent to Sarah, and said, “Quickly, prepare three measures of fine flour, knead it, and make bread cakes.” 7Abraham also ran to the herd, and took a tender and choice calf and gave it to the servant, and he hurried to prepare it. 8He took curds and milk and the calf which he had prepared, and set it before them; and he was standing by them under the tree as they ate.
9Then they said to him, “Where is your wife Sarah?” And he said, “There, in the tent.” 10He said, “I will certainly return to you at this time next year; and behold, your wife Sarah will have a son.” And Sarah was listening at the tent door, which was behind him. 11Now Abraham and Sarah were old, advanced in age; Sarah was past childbearing. 12So Sarah laughed to herself, saying, “After I have become old, am I to have pleasure, my lord being old also?” 13But the Lord said to Abraham, “Why did Sarah laugh, saying, ‘Shall I actually give birth to a child, when I am so old?’ 14Is anything too difficult for the Lord? At the appointed time I will return to you, at this time next year, and Sarah will have a son.” 15Sarah denied it, however, saying, “I did not laugh”; for she was afraid. And He said, “No, but you did laugh.”
Genesis 18:2-16 (NASB)