Psalms 40:9,10 - Joseph Benson’s Commentary on the Old and New Testaments

I have preached righteousness Namely, thy righteousness, as it is expressed in the next verse; that is, thy faithfulness, as it is there explained; or, righteousness properly so called; for both were fully declared and demonstrated in Christ; the former in God's sending him into the world, according to his promise, Acts 13:23; and the latter in inflicting death upon him for man's sin, Romans 3:25-26. In the great congregation In the most public and solemn assemblies; not only to the Jews, but also to all nations; to whom Christ preached by his apostles, as is observed, Ephesians 2:17. I have not refrained From preaching it, even to the face of mine enemies, though I knew my preaching would cost me my life. O Lord, thou knowest I call thee to witness the truth of what I say. I have not hid thy righteousness within my heart I had it there, Psalms 40:8; but did not shut it up there, but spread it abroad for thy glory and the good of mankind. I have declared thy salvation Which thou hast wrought both for me and by me.