Romans Chapter 4, Verse 21

21: και πληροφορηθεις οτι ο επηγγελται δυνατος εστιν και ποιησαι— edit Textus Receptus
21: And being fully persuaded that, what he had promised, he was able also to perform.— edit KJV text
21: Most fully knowing that whatsoever he has promised, he is able also to perform.— edit Douay text