Asa prayed to the Lord his God: "O Lord, there is no one but you who can help the weak when they are vastly outnumbered. Help us, O Lord our God, for we rely on you and have marched on your behalf against this huge army. O Lord our God, don't let men prevail against you!"

He followed God during the lifetime of Zechariah, who taught him how to honor God. As long as he followed the Lord, God caused him to succeed.