Genesis 18:2-3, 8

Abraham looked up and saw three men standing nearby. When he saw them, he hurried from the entrance of his tent to meet them and bowed low to the ground. He said, “If I have found favor in your eyes, my lord, do not pass your servant by.

He then brought some curds and milk and the calf that had been prepared, and set these before them. While they ate, he stood near them under a tree.