Albert Barnes Commentary Judges 20:28

"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 Jehovah said, Go up; for to-morrow I will deliver him into thy hand." — Judges 20:28 (ASV)

Phinehas, the son of Eleazar ... - A most important chronological statement, which makes it probable that these events occurred within twenty years of the death of Joshua.

To-morrow - The two former answers only commanded them to go up against Benjamin; now, for the first time, the promise is added, Tomorrow, etc. .