Bede

Stretching, you extend your bow over scepters, says the Lord. The bow signifies the sudden coming of the divine judgment, by which he foresaw that even scepters, that is, the kingdoms of the world, should be examined. Therefore, the prophet insinuates what the Lord, ascending on his horses, that is, filling and ruling the apostles and their successors with his grace, does among them: Stretching, he says, you extend your bow over scepters, that is, by threatening through the teachers, you will threaten that your judgment will come …

Commentary on the Song of Habakkuk ↗