Deuteronomy 23:4

because they met you not with bread and time water in the way when ye came forth out of Egypt, thus violating every custom of hospitality, as it was practiced even by savage tribes, Deuteronomy 2:19, not to speak of the natural affection of kindred, and because they hired against thee Balaam, the son of Beor, of Pethor of Mesopotamia, to curse thee, Numbers 22:5.