Judges 20:23, 26

And the children of Israel went up and wept before Jehovah until even; and they asked of Jehovah, saying, Shall I again draw nigh to battle against the children of Benjamin my brother? And Jehovah said, Go up against him.

Then all the children of Israel, and all the people, went up, and came unto Beth-el, and wept, and sat there before Jehovah, and fasted that day until even; and they offered burnt-offerings and peace-offerings before Jehovah.