Judges Chapter 12

12:5-6
And the Gileadites took the passages of Jordan before the Ephramites: and it was so, that when those Ephramites were escaped said, Let me go over; that the men of Gilead said unto him, Art thou an Ephramite? If he said, Nay;
Then said they unto him, Say now Shibboleth: and he said Sibboleth: for he could not frame to pronounce it right. Then they took him, and slew him at the passages of Jordan: and there fell at that time of the Ephraimites forty and two thousand.