Genesis 18:2-3, 8

He lifted up his eyes and looked, and behold, three men were standing in front of him. When he saw them, he ran from the tent door to meet them and bowed himself to the earth and said, “O Lord, if I have found favor in your sight, do not pass by your servant.

Then he took curds and milk and the calf that he had prepared, and set it before them. And he stood by them under the tree while they ate.