Strong H5087 נָדַר nâdar · to vow

Judges

1. Judges 11:30
   And Jephthah vowed a vow unto the Lord, and said, If thou shalt without fail deliver the children of Ammon into mine hands,
2. Judges 11:39
   And it came to pass at the end of two months, that she returned unto her father, who did with her according to his vow which he had vowed: and she knew no man. And it was a custom in Israel,