Psalm 48

Verses 4-7 tell of an attack that was planned against Jerusalem; a plan that was providentally thwarted by God. It was a plan witnessed by the sons of Korah who penned this song in commemoration of the wonder of God's work in that battle that never was. Whether this was the siege of Hezekiah's day or some other invasion I don't know. What I do know is that it is one more situation where God displayed his power in a way that strengthens the faith of believers while leaving the skeptics baffled.
Stuart