Matthew Henry Commentary Revelation 7:9-12

"After these things I saw, and behold, a great multitude, which no man could number, out of every nation and of [all] tribes and peoples and tongues, standing before the throne and before the Lamb, arrayed in white robes, and palms in their hands; and they cry with a great voice, saying, Salvation unto our God who sitteth on the throne, and unto the Lamb. And all the angels were standing round about the throne, and [about] the elders and the four living creatures; and they fell before the throne on their faces, and worshipped God, saying, Amen: Blessing, and glory, and wisdom, and thanksgiving, and honor, and power, and might, [be] unto our God for ever and ever. Amen." — Revelation 7:9-12 (ASV)

The first fruits of Christ having led the way, the Gentiles converted later follow, and ascribe their salvation to God and the Redeemer with triumph. In acts of religious worship, we come near to God and must come through Christ; the throne of God could not be approached by sinners if it were not for a Mediator. They were clothed with the robes of justification, holiness, and victory; and they had palms in their hands, as conquerors used to appear in their triumphs.

Such a glorious appearance will the faithful servants of God make at last, when they have fought the good fight of faith and finished their course. With a loud voice, they gave to God and the Lamb the praise of the great salvation. Those who enjoy eternal happiness must and will bless both the Father and the Son; they will do it publicly and with fervor.

We see what the work of heaven is, and we ought to begin it now, to engage our hearts deeply in it, and to long for that world where our praises, as well as our happiness, will be made perfect.