Augustine of Hippo

"That they may bind their kings in fetters, and their nobles in bonds of iron" [Psalm 149:8]. "To execute upon them the judgment written" [Psalm 149:9]. The kings of the Gentiles are to be bound in fetters, "and their nobles in fetters," and that "of iron."...For these verses which we are beginning to explain are obscure. For for this purpose God willed to set down some of His verses obscurely, not that anything new should be dug out of them, but that what was already well known, might be made new by being obscurely set forth. …

Exposition on Psalm 149 ↗

Jerome

To bind their kings in fetters. Do you wish the peoples to be set free? bind the teachers. To bind the kings. He did not call them teachers, but kings: for they reign by the miseries of those people. To bind their kings in fetters. He put it well, in fetters: lest the teachers should run about too much, lest they deceive many, but let them be bound and stand still. And their nobles in iron chains. Their nobles. You may see them saying among the heretics: This man is learned, that one works signs, this one casts out demons. …

Homily 59, on Psalm 149 ↗