Three men, as they seemed to be, though indeed they were angels in men's shape. Bowed himself toward the ground; a respect usually paid to persons of quality, such as these seemed to be.
Related Commentaries of Genesis 18:2
Genesis 18:2
2 And he lift up his eyes and looked, and, lo, three men stood by him: and when he saw them, he ran to meet them from the tent door, and bowed himself toward the ground,