Genesis 18:1-5:
YHWH appeared to Abraham by the oak grove of Mamre, while Abraham sat at the entrance to his tent in the heat of the day. Looking up, Abraham saw three travelers standing nearby. When he saw them, Abraham ran from the entrance of the tent to greet them; and bowing to the ground, said, “If I have found favor in your eyes, please do not pass by our tent. Let some water be brought, that you may bathe your feet, and then rest yourselves beneath this tree. As you have come to your faithful one, let me bring you a little food, that you may refresh yourselves. Afterward, you may go on your way.”