What does Judges 11:34 mean?
Jephthah had offered a foolish vow to God (Judges 11:30–31) in hopes of military success over the Ammonites. This was a victory God clearly already intended to deliver. In exchange for victory and safe return of himself to his home, Jephthah promised an extreme sacrifice. Depending on his exact intentions, this could infer a wide range of meanings. It may imply human sacrifice, animal sacrifice, or being permanently devoted to God's service. Whatever Jephthah intended, he clearly had not planned to include his daughter.Triumphant following the utter defeat of the Ammonites, Jephthah returns to his house in Mizpah. He was fully aware of his vow to the Lord and probably anxious to see who or what would be required. Rather than a servant, or animal, it is his joyful daughter. She comes out dancing, shaking tambourines, and celebrating his success and return.
The weight of Jephthah's vow grows as we see how happy and full of life his daughter is. It amplifies further when the text notes she is his only child. Jephthah will not take this well (Judges 11:35).