Genesis 18:2-3, 8

When he raised his eyes and looked up, behold, three men were standing [a little distance] from him. When he saw them, he ran from the tent door to meet them and bowed down [with his face] to the ground, and Abraham said, “My lord, if now I have found favor in your sight, please do not pass by your servant [without stopping to visit].

Then he took curds and milk and the calf which he had prepared, and set it before the men; and he stood beside them under the tree while they ate.