15 Then God said to Abraham, "As for Sarai your wife, you shall not call her name Sarai, but Sarah shall be her name. 16 "I will bless her, and indeed I will give you a son by her Then I will bless her, and she shall be a mother of nations; kings of peoples will come from her." 17 Then Abraham fell on his face and laughed, and said in his heart, "Will a child be born to a man one hundred years old? And will Sarah, who is ninety years old, bear a child?" 18 And Abraham said to God, "Oh that Ishmael might live before You!" 19 But God said, "No, but Sarah your wife will bear you a son, and you shall call his name Isaac; and I will establish My covenant with him for an everlasting covenant for his descendants after him. 20 "As for Ishmael, I have heard you; behold, I will bless him, and will make him fruitful and will multiply him exceedingly He shall become the father of twelve princes, and I will make him a great nation. 21 "But My covenant I will establish with Isaac, whom Sarah will bear to you at this season next year."
22 When He finished talking with him, God went up from Abraham. 23 Then Abraham took Ishmael his son, and all the servants who were born in his house and all who were bought with his money, every male among the men of Abraham's household, and circumcised the flesh of their foreskin in the very same day, as God had said to him. 24 Now Abraham was ninety-nine years old when he was circumcised in the flesh of his foreskin. 25 And Ishmael his son was thirteen years old when he was circumcised in the flesh of his foreskin. 26 In the very same day Abraham was circumcised, and Ishmael his son. 27 All the men of his household, who were born in the house or bought with money from a foreigner, were circumcised with him.
1 Now the LORD appeared to him by the oaks of Mamre, while he was sitting at the tent door in the heat of the day. 2 When he lifted up 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 himself to the earth, 3 and said, "My Lord, if now I have found favor in Your sight, please do not pass Your servant by. 4 "Please let a little water be brought and wash your feet, and rest yourselves under the tree; 5 and I will bring a piece of bread, 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." 6 So Abraham hurried into the tent to Sarah, and said, "Quickly, prepare three measures of fine flour, knead it and make bread cakes." 7 Abraham also ran to the herd, and took a tender and choice calf and gave it to the servant, and he hurried to prepare it. 8 He took curds and milk and the calf which he had prepared, and placed it before them; and he was standing by them under the tree as they ate.
9 Then they said to him, "Where is Sarah your wife?" And he said, "There, in the tent." 10 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. 11 Now Abraham and Sarah were old, advanced in age; Sarah was past childbearing. 12 Sarah laughed to herself, saying, "After I have become old, shall I have pleasure, my lord being old also?" 13 And the LORD said to Abraham, "Why did Sarah laugh, saying, 'Shall I indeed bear a child, when I am so old?' 14 "Is 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." 15 Sarah denied it however, saying, "I did not laugh"; for she was afraid. And He said, "No, but you did laugh."
16 Then the men rose up from there, and looked down toward Sodom; and Abraham was walking with them to send them off. 17 The LORD said, "Shall I hide from Abraham what I am about to do, 18 since Abraham will surely become a great and mighty nation, and in him all the nations of the earth will be blessed? 19 "For I have chosen him, so that he may command his children and his household after him to keep the way of the LORD by doing righteousness and justice, so that the LORD may bring upon Abraham what He has spoken about him." 20 And the LORD said, "The outcry of Sodom and Gomorrah is indeed great, and their sin is exceedingly grave. 21 "I will go down now, and see if they have done entirely according to its outcry, which has come to Me; and if not, I will know."