Genesis 18:4

The difficulty of procuring the necessaries of life when travelling in the East causes the duty of hospitality to be observed to an extent unknown to ourselves. Lane, in 'Modern Egyptians,' says that we have here a perfect picture of the manner in which a modern Bedawee sheikh receives travellers arriving at his encampment. He immediately orders his wife or woman to make bread; slaughters a sheep or some other animal, and dresses it in haste; and bringing milk and any other provisions that he may have ready at hand, sets all before his guests. If these be persons of high rank, he stands by them while they eat, as Abraham did in this case. The ready hospitality of Abraham is in striking contrast with the conduct of the Sodomites to the same visitors. Wash your feet] since they only wore sandals.