For he has made him, who knew no sin, to be sin for us; that we might be made the righteousness of God in him.
All Commentaries on 2 Corinthians 5:21 Go To 2 Corinthians 5
Cyril of Alexandria
AD 444
For this reason, we say that he was named sin; wherefore, the allwise Paul writes, “For our sakes he made him to be sin who knew nothing of sin,” that is to say, God the Father. For we do not say that Christ became a sinner. Far from it, but being just, or rather in actuality justice, for he did not know sin, the Father made him a victim for the sins of the world.