2 Chronicles 20:1-4  stands out to me with King Jehoshaphat who proclaims a fast when the 3 armies united to attack.

Even though He was at times inconsistent in his wal with the marriage and military alliance of Ahab,He knew God was deliverer and help  as he  humbled his soul and prayed with the corporate consecration.

The one thing God is saying is that whenever we a under attack seeking God in prayer and fasting is key,  furthermore don't wait to get in trouble to seek the Lord .