Judges 12:4-6 Living Bible (TLB)
4 Then Jephthah, furious at the taunt of Ephraim that the men of Gilead were mere outcasts[a] and the scum of the earth, mobilized his army and attacked the army of Ephraim. 5 He captured the fords of the Jordan behind the army of Ephraim, and whenever a fugitive from Ephraim tried to cross the river, the Gilead guards challenged him.
“Are you a member of the tribe of Ephraim?” they asked. If the man replied that he was not, 6 then they demanded, “Say ‘Shibboleth.’” But if he couldn’t pronounce the H and said, “Sibboleth” instead of “Shibboleth,” he was dragged away and killed. So forty-two thousand people of Ephraim died there at that time.