Genesis 18:1-19

Now the LORD appeared to Abraham by the terebinth trees of Mamre [in Hebron], while he was sitting at the tent door in the heat of the day. When he raised his eyes and looked up, behold, three men were standing [a little distance] from him. When he saw them, he ran from the tent door to meet them and bowed down [with his face] to the ground, and Abraham said, “My lord, if now I have found favor in your sight, please do not pass by your servant [without stopping to visit]. Please let a little water be brought [by one of my servants] and [you may] wash your feet, and recline and rest comfortably under the tree. And I will bring a piece of bread to refresh and sustain you; after that you may go on, since you have come to your servant.” And they replied, “Do as you have said.” So Abraham hurried into the tent to Sarah, and said, “Quickly, get ready three measures of fine meal, knead it and bake cakes.” Abraham also ran to the herd and brought a calf, tender and choice, and he gave it to the servant [to butcher], and he hurried to prepare it. Then he took curds and milk and the calf which he had prepared, and set it before the men; and he stood beside them under the tree while they ate. Then they said to him, “Where is Sarah your wife?” And he said, “There, in the tent.” He said, “I will surely return to you at this time next year; and behold, Sarah your wife will have a son.” And Sarah was listening at the tent door, which was behind him. [Rom 9:9-12] Now Abraham and Sarah were old, well advanced in years; she was past [the age of] childbearing. So Sarah laughed to herself [when she heard the LORD’S words], saying, “After I have become old, shall I have pleasure and delight, my lord (husband) being also old?” [1 Pet 3:6] And the LORD asked Abraham, “Why did Sarah laugh [to herself], saying, ‘Shall I really give birth [to a child] when I am so old?’ Is anything too difficult or too wonderful for the LORD? At the appointed time, when the season [for her delivery] comes, I will return to you and Sarah will have a son.” [Matt 19:26] Then Sarah denied it, saying, “I did not laugh”; because she was afraid. And He (the LORD) said, “No, but you did laugh.” Then the men got up from there, and looked toward Sodom; and Abraham walked with them to send them on the way. The LORD said, “Shall I keep secret from Abraham [My friend and servant] what I am going to do, [Gal 3:8] since Abraham is destined to become a great and mighty nation, and all the nations of the earth will be blessed through him? [Gen 12:2, 3] For I have known (chosen, acknowledged) him [as My own], so that he may teach and command his children and [the sons of] his household after him to keep the way of the LORD by doing what is righteous and just, so that the LORD may bring upon Abraham what He has promised him.”