Who shall lay any thing to the charge of God's elect? Who can implead such, or put in any accusation against them? There is nothing to accuse them of, they are justified; and there is none to accuse them: It is God that justifieth; the Supreme Judge hath absolved them. This seems to be taken out of Isaiah 50:8,9. They were Christ's words there, and spoken of God's justifying him; they are every believer's words here, and intended of God's justifying them. Here seems to be two reasons of their indemnity; one is implied, i.e. God's electing them: the other expressed, i.e. God's justifying and acquitting of them.
Related Commentaries of Romans 8:33
Romans 8:33
33 Who shall lay any thing to the charge of God's elect? It is God that justifieth.