Judges 12:6

Say, now, Shibboleth— The word has two senses in the Hebrew; namely, an ear of corn, and floods of water, Psalms 69:2. It is used in the latter sense here; and the test which the Gileadites put the Ephraimites to was to bid them say, "Let me pass over the water." The pronunciation of words of the same language varies greatly in different parts. An Athenian spoke Greek as differently from a Dorian as a northern man speaks English from an inhabitant of the south: it is no wonder, therefore, that the Ephraimites could not pronounce the word in the same manner as those did who inhabited the countries on the other side of Jordan. St. Peter was known for a Galilean by his accent in the court of Pilate's palace. See Matthew 26:73.