Genesis 18:1-19

And Jehovah appeared unto him by the oaks of Mamre, as he sat in the tent door in the heat of the day; and he lifted up his eyes and looked, and, lo, three men stood over against him: and when he saw them, he ran to meet them from the tent door, and bowed himself to the earth, and said, My lord, if now I have found favor in thy sight, pass not away, I pray thee, from thy servant: let now a little water be fetched, and wash your feet, and rest yourselves under the tree: and I will fetch a morsel of bread, and strengthen ye your heart; after that ye shall pass on: forasmuch as ye are come to your servant. And they said, So do, as thou hast said. And Abraham hastened into the tent unto Sarah, and said, Make ready quickly three measures of fine meal, knead it, and make cakes. And Abraham ran unto the herd, and fetched a calf tender and good, and gave it unto the servant; and he hasted to dress it. And he took butter, and milk, and the calf which he had dressed, and set it before them; and he stood by them under the tree, and they did eat. And they said unto him, Where is Sarah thy wife? And he said, Behold, in the tent. And he said, I will certainly return unto thee when the season cometh round; and, lo, Sarah thy wife shall have a son. And Sarah heard in the tent door, which was behind him. Now Abraham and Sarah were old, and well stricken in age; it had ceased to be with Sarah after the manner of women. And Sarah laughed within herself, saying, After I am waxed old shall I have pleasure, my lord being old also? And Jehovah said unto Abraham, Wherefore did Sarah laugh, saying, Shall I of a surety bear a child, who am old? Is anything too hard for Jehovah? At the set time I will return unto thee, when the season cometh round, and Sarah shall have a son. Then Sarah denied, saying, I laughed not; for she was afraid. And he said, Nay; but thou didst laugh. And the men rose up from thence, and looked toward Sodom: and Abraham went with them to bring them on the way. And Jehovah said, Shall I hide from Abraham that which I do; seeing that Abraham shall surely become a great and mighty nation, and all the nations of the earth shall be blessed in him? For I have known him, to the end that he may command his children and his household after him, that they may keep the way of Jehovah, to do righteousness and justice; to the end that Jehovah may bring upon Abraham that which he hath spoken of him.