וַיֵּ֤לֶךְ יִפְתָּח֙ עִם־זִקְנֵ֣י גִלְעָ֔ד וַיָּשִׂ֨ימוּ הָעָ֥ם אוֹת֛וֹ עֲלֵיהֶ֖ם לְרֹ֣אשׁ וּלְקָצִ֑ין וַיְדַבֵּ֨ר יִפְתָּ֧ח אֶת־כָּל־דְּבָרָ֛יו לִפְנֵ֥י יְהוָ֖ה בַּמִּצְפָּֽה׃ (פ)
Then Jephthah went with the elders of Gilead, and the people made him head and chief over them; and Jephthah spoke all his words before the LORD in Mizpah.
Read halakhic rulings (Jewish law) on Judges 11:11: and classical halakhic sources.