Judges 12

(12:1) After Jephthah finished burning his daughter for God to pay God back for helping him slaughter twenty Ammonite cities, he ran into some Ephraimites who were angry about being left out of the Ammonite slaughter. They were so pissed off about the whole thing that they threatened to burn down Jephthah's house.

(12:1) "The men of Ephraim ... said unto Jephthah, Wherefore passedst thou over to fight against the children of Ammon, and didst not call us to go with thee? we will burn thine house upon thee with fire."

(12:2-4) Jephthah claimed that he invited them to join him in the God-assisted slaughter, but they didn't come. Clearly, there was only one thing for Jephthah to do: call for a holy civil war. So that's what he did, and the men from Gilead defeated the Epharimites.

(12:2) "Jephthah said ... I and my people were at great strife with the children of Ammon; and when I called you, ye delivered me not out of their hands."

(12:3) "And the LORD delivered them into my hand: wherefore then are ye come up unto me this day, to fight against me?"

(12:4) "Then Jephthah gathered together all the men of Gilead, and fought with Ephraim: and the men of Gilead smote Ephraim."

(12:5-6)
42,000 killed for failing the "Shibboleth" test
After the battle, Jephthah posted guards at the Jordan River where the fleeing Ephraimites would have to cross. When an Ephraimite came to the crossing, the Gileadites would ask him if he was an Ephraimite. If he said, "No", they'd ask him to say "Shibboleth" (Ephraimites couldn't pronounce it correctly. It was like asking George W. Bush or Sarah Palin to say "nuclear.") Then when the lying Ephraimite mispronounced Shibboleth by saying Siboleth, they'd kill him.

And the shibboleth test worked like a charm. 42,000 Ephraimites failed the test and were killed trying to cross the Jordan.
God's 52nd Killing

(12:5) "When those Ephraimites which were escaped said, Let me go over; that the men of Gilead said unto him, Art thou an Ephraimite? If he said, Nay."

(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 ... and there fell at that time of the Ephraimites forty and two thousand."

(12:8-9) "Ibzan ... had thirty sons, and thirty daughters, whom he sent abroad, and took in thirty daughters."

(12:13-14) "Abdon ... had forty sons and thirty nephews, that rode on threescore and ten ass colts."

12:1 And the men of Ephraim gathered themselves together, and went northward, and said unto Jephthah, Wherefore passedst thou over to fight against the children of Ammon, and didst not call us to go with thee? we will burn thine house upon thee with fire.
12:2 And Jephthah said unto them, I and my people were at great strife with the children of Ammon; and when I called you, ye delivered me not out of their hands.
12:3 And when I saw that ye delivered me not, I put my life in my hands, and passed over against the children of Ammon, and the LORD delivered them into my hand: wherefore then are ye come up unto me this day, to fight against me?
12:4 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.
12:5 And the Gileadites took the passages of Jordan before the Ephraimites: and it was so, that when those Ephraimites which were escaped said, Let me go over; that the men of Gilead said unto him, Art thou an Ephraimite? If he said, Nay;
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.
12:7 And Jephthah judged Israel six years. Then died Jephthah the Gileadite, and was buried in one of the cities of Gilead.
12:8 And after him Ibzan of Bethlehem judged Israel.
12:9 And he had thirty sons, and thirty daughters, whom he sent abroad, and took in thirty daughters from abroad for his sons. And he judged Israel seven years.
12:10 Then died Ibzan, and was buried at Bethlehem.
12:11 And after him Elon, a Zebulonite, judged Israel; and he judged Israel ten years.
12:12 And Elon the Zebulonite died, and was buried in Aijalon in the country of Zebulun.
12:13 And after him Abdon the son of Hillel, a Pirathonite, judged Israel.
12:14 And he had forty sons and thirty nephews, that rode on threescore and ten ass colts: and he judged Israel eight years.
12:15 And Abdon the son of Hillel the Pirathonite died, and was buried in Pirathon in the land of Ephraim, in the mount of the Amalekites.