Blessed be the LORD for evermore. Amen, and Amen. Blessed be the Lord for evermore - Let him treat us as he will, his name deserves eternal praises: our affliction, though great, is less than we have deserved.
This verse concludes the Third Book of the Psalter; and, I think, has been added by a later hand, in order to make this distinction, as every Masoretic Bible has something of this kind at the end of each book. The verse is wanting in one of Kennicott's and one of De Rossi's MSS.; in another it is written without points, to show that it does not belong to the text, and in three others it is written separately from the text. It is found, however, in all the ancient Versions. The Chaldee finishes thus: "Blessed be the name of the Lord in this world. Amen and Amen. Blessed be the name of the Lord in the world to come. Amen and Amen." And the reader will find no difficulty to subscribe his Amen, so be it.
Commentary on the Bible, by Adam Clarke [1831].