Judges 12:4 - Clarke's commentary and critical notes on the Bible

Then Jephthah gathered together all the men of Gilead, and fought with Ephraim: and the men of Gilead smote Ephraim, because they said, Ye Gileadites are fugitives of Ephraim among the Ephraimites, and among the Manassites. And fought with Ephraim - Some commentators suppose that there were two battles in which the Ephraimites were defeated: the first mentioned in the above clause; and the second occasioned by the taunting language mentioned in the conclusion of the verse, Ye Gileadites are fugitives of Ephraim. Where the point of this reproach lies, or what is the reason of it, cannot be easily ascertained.