New Defender's Study Bible Notes
3:1 Shigionoth. “Shigionoth” refers to a distinctive type of music, sung in a spirit of victory and excitement. Habakkuk’s book is the most poetic of all the prophets, and this last chapter is an actual psalm.
3:2 was afraid. This psalm, designed to be sung as a prayer hymn, seeks both to review God’s works of old for His people, as a means of encouraging them in relation to the troubles that were coming, and also to assure that God’s ancient promises will surely be fulfilled.
3:2 revive thy work. Although God’s warnings surely were enough to make them afraid, Habakkuk and the people could still pray for revival and for God to be merciful even in His wrath against their sins.