Matthew Poole and continuators on Revelation 5:9

9 And they sung a new song , saying, Thou art worthy to take the book, and to open the seals thereof : for thou wast slain , and hast redeemed us to God by thy blood i, out of every kindred, and tongue, and people, and nation k;

By a new Song is either to be understood an excellent Song, (for new Songs are usually most valued) or (which pleaseth me best) new, as to the matter of it; for the Servants of God under the Old-Testament could not bless God for the actual Redemption of Man, by the Blood of Christ, but only rejoice in hope, imbracing the Promises seen afar off by the Eye of Faith.

They acknowledge Christ worthy to be intrusted with his Church, and the Revelations of the Counsels of God, with Relation to it, to open them.

Because he had redeemed his Church, scattered over all the World, from Sin, Death, and Hell, unto God, to serve him, and to live for ever with him, and that with no lesser Price, than his own Blood; Wherefore (as the Apostle tells us, Phil. 2.9.) God had highly exalted him.

Marginal references: Chap. 14.3.; Chap. 4.11.; 1 Cor. 6.20. & 7.23. Eph. 1.7. Col. 1.14. 1 Pet. 1.18, 19. 1 Joh. 1.7.