John Chrysostom

"And shaking out their clothes," it says, "they threw dust into the air," to make insurrection more fierce, because they wished to frighten the governor. And observe; they do not say what the charge was, as in fact they had nothing to allege, but only think to strike terror by their shouting. "The tribune commanded," etc. …

Homily on Acts 48 ↗

Bede

As they were shouting, throwing off their cloaks, and throwing dust into the air. In the Lord's passion, the priest alone leaping from the throne tears his garments, because then the old priesthood was to be changed to the new. But now, because after the death of the apostles, the whole nation was to be stripped of the glory of the kingdom, all throw off their garments, and lift their clamor mixed with dust to heaven. According to what the Psalmist says: "The pride of those who hate you rises always" (Psalm 73).

Commentary on Acts ↗

Cassiodorus

"And as they cried out and threw off their garments," etc. As the Jews made an uproar and threw dust up into the sky, the tribune commanded Paul to be brought into the castle. While they whipped him to learn the cause of the uproar that had been stirred up, Paul said to the centurion that stood by him: "See if it is lawful for you to scourge a Roman that hath not been condemned. "Terrified by these words, he loosed him and put the imminent tortures on hold. …

Complexiones on the Acts of the Apostles ↗