וַיִּדַּ֨ר יִפְתָּ֥ח נֶ֛דֶר לַיהוָ֖ה וַיֹּאמַ֑ר אִם־נָת֥וֹן תִּתֵּ֛ן אֶת־בְּנֵ֥י עַמּ֖וֹן בְּיָדִֽי׃
And Jephthah vowed a vow unto the LORD, and said: ‘If Thou wilt indeed deliver the children of Ammon into my hand,
Read halakhic rulings (Jewish law) on Judges 11:30: and classical halakhic sources.