Charles H. Spurgeon on Psalms 129:5

If any one be desirous to accept these words, Let them be confounded and turned backward, as they sound, he will devoutly explain the imprecation: that is to say, it may be an imprecation of good confusion, which leads to repentance, and of turning to God from sin: thus Bellarmine. There is a confounding by bringing grace, glory, and turning from the evil way. Thus some enemies and persecutors of the Christians have been holily confounded and turned to the faith of Christ; as St. Paul, who full of wrath and slaughter was going to Damascus that he might afflict the believers, but was graciously confounded on the road. —Thomas Le Blanc.