Judges 11:30-31
11:30 Jephthah made a vow to the Lord, saying, “If you really do hand the Ammonites over to me,
11:31 then whoever is the first to come through the doors of my house to meet me when I return safely from fighting the Ammonites – he will belong to the Lord and I will offer him up as a burnt sacrifice.”
Judges 11:35
11:35 When he saw her, he ripped his clothes and said, “Oh no! My daughter! You have completely ruined me! You have brought me disaster! I made an oath to the Lord, and I cannot break it.”