Genesis 18:3-5

3and said, My lord, if now I have found favor in thy sight, pass not away, I pray thee, from thy servant:

4let now a little water be fetched, and wash your feet, and rest yourselves under the tree:

5and 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.