But as it is written - Isaiah 52:15. This is not literally quoted, but the sense is retained. The design of quoting it is to justify the principle on which the apostle acted. It was revealed that the gospel should be preached to the Gentiles; and he regarded it as a high honor to be the instrument of carrying this prediction into effect.
Related Commentaries of Romans 15:21
Romans 15:21
21 But as it is written, To whom he was not spoken of, they shall see: and they that have not heard shall understand.