Bible Notes Online - 2-Chronicles 20 - ESV
Commentary

v1-4: The threat from Moab, Ammon, and Mount Seir, a large army. There was a spiritual response from Jehoshaphat and the people. He proclaimed a fast, and all the people joined in. Whatever the situation, seek the Lord, and ask His help. This is preferable to the more normal human tendency to panic.

v5: Jehoshaphat's prayer reflects a knowledge of the character of God, and an understanding of the history of Israel. Like Jephthah (Judg 11.12-27), Jehoshaphat knew his Bible!

v6: God is in control; He rules over all the kingdoms of the earth; no one is able to withstand Him.

v7: The acknowledgement that God is faithful; the same God who spoke to Abraham, and who brought the people of Israel into the land of Canaan. God gave this land to His people.

v8: The Lord God chose a place to put His Name, the temple (sanctuary).

v9: Jehoshaphat referred back to Solomon's prayer (6.28-30), and asked God to honour that prayer.

v10-11: The vast army was attacking Judah. The people of Israel had been forbidden from taking the territory of these nations, since they were Semitic peoples, not Canaanites. They were repaying that obedience by attacking Judah.

v12: Jehoshaphat claimed no strength of his own, but relied on the all-powerful God. Jehoshaphat trusted God to do whatever He wanted; he had no presumption that God would act in a particular way. Compare Asa's prayer (11.11).

v13: All the people of Judah were present, sharing in this prayer.

v14-17: The Lord sent His prophet Jahaziel to bring His word, a response to the devotion of His people. The people were not to be discouraged, since the Lord would fight for His people. Jehoshaphat and the people had simply to believe God, and obey Him. Jahaziel is not mentioned elsewhere in scripture. His family line suggests he is a leader of singing among the people, as he is descended from Asaph. Whilst he was therefore used to exercising a public ministry, he was not normally involved in prophetic ministry.

In this battle the people would not have to fight; this was not true of every battle. Perhaps it was because Jehoshaphat had such a vast army (17.14-19), and victory may have therefore been attributed to human might. Sometimes the Lord will deal with an issue, and fight a battle without our direct involvement; He thus shows His mercy and declares His glory. Even so, the command is still to obedience.

v18-19: The response of gratitude.

God had spoken, and they believed His word. Their response was the same as that after the battle. When God has spoken, can we doubt Him?

v20: The command was simple; believe in the Lord, and see His salvation.

v21: In response to God's promises the people began to sing praises to God. It seems that the singing did not actually bring about the victory, for that was God's promise anyway. The singing was part of the people's response to God's promises.

v22-23: The Lord God's power was manifested in the heathen armies destroying each other.

v24-26: The scale of the victory; the whole army was completely destroyed. There was plunder that required three days to collect; and the people gathered together to thank God.

v27-30: The people returned joyfully to Jerusalem. News of the victory spread to surrounding countries, and they became fearful that the Lord God had fought for His people.

v31-34: In spite of Jehoshaphat's zeal, there remained some rebellion in the people's hearts; his corporate reforms could not last unless there was real personal repentance and commitment. See 22.9.

v35-37: Jehoshaphat made another unwise alliance, see 1Kings 22.51. He had not learned from the previous incident. This was doubtless towards the end of Jehoshaphat's reign, since Ahaziah became king of Israel in the 17th year of Jehoshaphat's reign.