John Gills Exposition of the Bible Commentary - Judges 12:4
Then Jephthah gathered together all the men of Gilead, and fought with Ephraim ,.... The Ephraimites not being pacified with the account Jephthah gave of the war between him and the children of Ammon, but continuing in their tumultuous outrage; he, being a man of spirit and courage, got as many of the Gileadites together as he could, and gave them battle: and the men of Gilead smote Ephraim ; had the advantage of them, worsted them, killed many of them, and put the rest to flight: ... read more
Matthew Henry's Complete Commentary - Judges 12:1-7
Here Is, I. The unreasonable displeasure of the men of Ephraim against Jephthah, because he had not called them in to his assistance against the Ammonites, that they might share in the triumphs and spoils, Jdg. 11:1. Pride was at the bottom of the quarrel. Only by that comes contention. Proud men think all the honours lost that go beside themselves, and then who can stand before envy? The Ephraimites had the same quarrel with Gideon (Jdg. 8:1), who was of Manasseh on their side Jordan, as... read more