In Judges 20:18, the Israelites inquire of God who should lead the battle against Benjamin, similar to how they sought guidance in Judges 1:1-2 for who should lead against the Canaanites. Both instances show the Israelites seeking divine direction for military action.
Judges 20:23 describes the Israelites weeping and seeking the Lord's counsel after a defeat, similar to David in 1 Samuel 30:8, who seeks God's guidance after the Amalekites raid Ziklag. Both passages emphasize the importance of seeking God's will in times of distress.
In Judges 20:26, the Israelites fast and offer sacrifices, seeking God's favor after their defeat. This is akin to Joel 2:12-13, where God calls for fasting and repentance. Both passages highlight the theme of repentance and seeking God's mercy.
Judges 20:35 describes the Lord giving victory to Israel over Benjamin, similar to the victory over Ai in Joshua 8:18-22. Both victories are attributed to divine intervention and strategic warfare.
Judges 20:48 describes the Israelites putting the Benjamites to the sword, similar to the command in Deuteronomy 13:15 to destroy a city that has turned to idolatry. Both passages reflect the theme of purging evil from among the people.