‘ And the elders of Gilead said to Jephthah, “Yahweh shall be witness between us. Surely according to your word, so will we do.” '
The elders gave their solemn oath before Yahweh that they would do exactly as he requested.
Related Commentaries of Judges 11:10
Judges 11:10
10 And the elders of Gilead said unto Jephthah, The LORD be witnessc between us, if we do not so according to thy words.