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 fugitives of Ephraim, O Gileadites, in the midst of Ephraim and in the midst of Manasseh.” 5The Gileadites 2captured the fords of the Jordan opposite Ephraim. And it happened when any of the fugitives of Ephraim said, “Let me cross over,” the men of Gilead would say to him, “Are you an Ephraimite?” If he said, “No,” 6then they would say to him, “Say now, ‘Shibboleth.’” But he said, “Sibboleth,” for he could not 3pronounce it correctly. Then they seized him and slew him at the fords of the Jordan. Thus there fell at that time 42,000 of Ephraim.