Even as David also describes the blessedness of the man, unto whom God imputes righteousness without works,
All Commentaries on Romans 4:6 Go To Romans 4
Ambrosiaster
AD 400
Paul backs this up by the example of the prophet David, who says that those are blessed of whom God has decreed that, without work or any keeping of the law, they are justified before God by faith alone. Therefore he foretells the blessedness of the time when Christ was born, just as the Lord himself said: “Many prophets and righteous men longed to see what you see and to hear what you hear and did not hear it.” Commentary on Paul’s Epistles.