Judges 20:26 (KJV)

And the children of Israel came near against the children of Benjamin the second day.

And Benjamin went forth against them out of Gibeah the second day, and destroyed down to the ground of the children of Israel again eighteen thousand men; all these drew the sword.

Then all the children of Israel, and all the people, went up, and came unto the house of God, and wept, and sat there before the Lord, and fasted that day until even, and offered burnt offerings and peace offerings before the Lord.

And the children of Israel enquired of the Lord, (for the ark of the covenant of God was there in those days,

And Phinehas, the son of Eleazar, the son of Aaron, stood before it in those days,) saying, Shall I yet again go out to battle against the children of Benjamin my brother, or shall I cease? And the Lord said, Go up; for to morrow I will deliver them into thine hand.