Judges 12:6

12:6 then said they to him, Say now Shibboleth; and he said Sibboleth; for he couldn't manage to pronounce it right: then they laid hold on him, and killed him at the fords of the Jordan. There fell at that time of Ephraim forty-two thousand.
-World English Bible

Other Translation

12:6 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.
-King James Version