Stand up. The people had prostrated themselves (see the comment on Nehemiah 9:3) for confession and prayer; they are now bidden to "stand up" for praise. Compare the practice of the Christian Church.
Blessed be. Literally, "let them bless." The Levites turn their address, after its opening clause, from the people to Jehovah himself, who henceforth becomes the subject of it. Thy glorious name. The high honour due to the "name" of God is taught by the sacred writers with one uniform voice from Moses (Exodus 20:7)to the last 'surviving apostle (Revelation 15:4).
The "glorious name" of God is an expression which occurs four times in our version of the Old Testament; but the exact phrase here used is found only in Psalms 72:19.