Jerome

He who is cautious and wary can avoid sins for a while, but he who is secure in his own justice opposes God, and deprived of his help, he is subject to the snares of the enemy. "Let rottenness," says Habakkuk, "enter into my bones and swarm under me, that I may rest in the day of tribulation, that I may go up to my people that are girded." He prays earnestly for tribulations and trials and affliction of soul so that, in the next world, he may join the company of those who are already reigning with Christ. …

Against the Pelagians 2.24 ↗

Bede

And beneath me, my strength was disturbed. However, he rightly says that his strength was disturbed not in himself, but beneath himself, because the prophet, having been taken up to the contemplation of heavenly mysteries, saw himself, as it were, elevated above himself; and the higher he is made by the light of contemplation, the more he sees himself as imperfect by the merit of his actions. For being lifted up to the sight of the highest things, he is rightly disturbed by the things he has done in the lowest. …

Commentary on the Song of Habakkuk ↗

Bonaventure

The third origin of the fear of the Lord is from the consideration of the severity of divine vengeance. Whence in Habakkuk: "Lord, I have heard your report and was afraid. I heard, and my belly was troubled; at the voice my lips trembled. Let rottenness enter into my bones and swarm beneath me, that I may rest in the day of tribulation." He says: "Let rottenness enter into my bones, and let it swarm beneath me, that I may rest in the day of tribulation." Not only in the day of tribulation or severity of the last judgment, but of any …

Collationes de Septem Donis, Collation 2 ↗