Judges 12:3

1 Now the men of Ephraim came together and took up arms and went over to Zaphon; and they said to Jephthah, Why did you go over to make war against the children of Ammon without sending for us to go with you? Now we will put your house on fire over you.

2 And Jephthah said to them, I and my people were in danger, and the children of Ammon were very cruel to us, and when I sent for you, you gave me no help against them.

3 So when I saw that there was no help to be had from you, I put my life in my hand and went over against the children of Ammon, and the Lord gave them into my hands: why then have you come up to me this day to make war on me?

4 Then Jephthah got together all the men of Gilead and made war on Ephraim; and the men of Gilead overcame Ephraim.

5 And the Gileadites took the crossing-places of Jordan against the Ephraimites; and when any of the men of Ephraim who had gone in flight said, let me go over; the men of Gilead said to him, Are you an Ephraimite? And if he said, No;

6 Then they said to him, Now say Shibboleth; and he said Sibboleth, and was not able to say it in the right way; then they took him and put him to death at the crossing-places of Jordan; and at that time forty-two thousand Ephraimites were put to death.