Genesis 18:3

Then the two angels came to Sodom in the evening as Lot was sitting in the gate of Sodom. Lot saw them and rose to meet them and bowed down with his face to the ground.

And he said, “Come in, blessed of Yahweh! Why do you stand outside since I have prepared the house and a place for the camels?”

So Joseph found favor in his sight and attended on him; and he appointed him overseer over his house, and all that he owned he gave in his hand.

Do not neglect to show hospitality to strangers, for by this some have entertained angels without knowing it.