וַיֹּאמְר֥וּ זִקְנֵֽי־גִלְעָ֖ד אֶל־יִפְתָּ֑ח יְהוָ֗ה יִהְיֶ֤ה שֹׁמֵ֙עַ֙ בֵּֽינוֹתֵ֔ינוּ אִם־לֹ֥א כִדְבָרְךָ֖ כֵּ֥ן נַעֲשֶֽׂה׃
And the elders of Gilead said unto Jephthah: ‘The LORD shall be witness between us; surely according to thy word so will we do.’
Read halakhic rulings (Jewish law) on Judges 11:10: and classical halakhic sources.