Genesis 18:2-3, 8

When he lifted up his eyes and looked, behold, three men were standing opposite him; and when he saw them, he ran from the tent door to meet them and bowed himself to the earth, and said, “My Lord, if now I have found favor in Your sight, please do not pass Your servant by.

He took curds and milk and the calf which he had prepared, and placed it before them; and he was standing by them under the tree as they ate.