Judges 12:6-7

they said, ‘All right, say “Shibboleth”.’ If he said, ‘Sibboleth’, because he could not pronounce the word correctly, they seized him and killed him at the fords of the Jordan. Forty-two thousand Ephraimites were killed at that time. Jephthah led Israel for six years. Then Jephthah the Gileadite died and was buried in a town in Gilead.