Genesis 18:1-8

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.