Judges 12:4-6

4Then Jephthah gathered all the men of Gilead and fought Ephraim; and the men of Gilead 1defeated Ephraim, because they said, “You are survivors of Ephraim, you Gileadites, in the midst of Ephraim and in the midst of Manasseh.” 5And the Gileadites 2took control of the crossing places of the Jordan opposite Ephraim. And it happened whenever any of the survivors of Ephraim said, “Let me cross over,” that the men of Gilead would say to him, “Are you an Ephraimite?” If he said, “No,” 6then they would say to him, “Just say, ‘Shibboleth.’” But he said, “Sibboleth,” for he was not 3prepared to 4pronounce it correctly. Then they seized him and slaughtered him at the crossing places of the Jordan. So at that time forty-two thousand from Ephraim fell.