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.
The Ephraimites were the Gileadites’ neighbors to the west. They resented the fact that Jephthah had not requested their assistance in the war with the Ammonites. We noted earlier that the Ephraimites considered themselves superior to their brethren in some respects (cf. Judges 8:1). They foolishly threatened to punish Jephthah for this affront (Judges 12:1).