New King James Version (NKJV)
Judges 11
37 Then she said to her father, "Let this thing be done for me: let me alone for two months, that I may go and wander on the mountains and bewail my virginity, my friends and I."
38 So he said, "Go." And he sent her away for two months; and she went with her friends, and bewailed her virginity on the mountains.
39 And it was so at the end of two months that she returned to her father, and he carried out his vow with her which he had vowed. She knew no man. And it became a custom in Israel
40 that the daughters of Israel went four days each year to lament the daughter of Jephthah the Gileadite.
Judges 12
1 Then the men of Ephraim gathered together, crossed over toward Zaphon, and said to Jephthah, "Why did you cross over to fight against the people of Ammon, and did not call us to go with you? We will burn your house down on you with fire!"
2 And Jephthah said to them, "My people and I were in a great struggle with the people of Ammon; and when I called you, you did not deliver me out of their hands.
3 So when I saw that you would not deliver me, I took my life in my hands and crossed over against the people of Ammon; and the Lord delivered them into my hand. Why then have you come up to me this day to fight against me?"
4 Now Jephthah gathered together all the men of Gilead and fought against Ephraim. And the men of Gilead defeated Ephraim, because they said, "You Gileadites are fugitives of Ephraim among the Ephraimites and among the Manassites."
5 The Gileadites seized the fords of the Jordan before the Ephraimites arrived. And when any Ephraimite who escaped said, "Let me cross over," the men of Gilead would say to him, "Are you an Ephraimite?" If he said, "No,"
6 then they would say to him, "Then say, ’Shibboleth’!" And he would say, "Sibboleth," for he could not pronounce it right. Then they would take him and kill him at the fords of the Jordan. There fell at that time forty-two thousand Ephraimites.
7 And Jephthah judged Israel six years. Then Jephthah the Gileadite died and was buried in among the cities of Gilead.