Genesis 18:1-5

Now the Lord came to him by the holy tree of Mamre, when he was seated in the doorway of his tent in the middle of the day; And lifting up his eyes, he saw three men before him; and seeing them, he went quickly to them from the door of the tent, and went down on his face to the earth; And said, My Lord, if now I have grace in your eyes, do not go away from your servant: Let me get water for washing your feet, and take your rest under the tree: And let me get a bit of bread to keep up your strength, and after that you may go on your way: for this is why you have come to your servant. And they said, Let it be so.