If we inquire who these were, we are told, Revelation 7:14, by the best Interpreter: These are they which came out of great tribulation, and have washed their robes, & c. So that they do not seem to be the one hundred and forty-four thousand mentioned for preservation in and from the evil, Revelation 7:4, but such as had escaped, or were not in or going into tribulation, but come out. The number of the former was determined; it is said of these, it could not be numbered. These were glorified ones, not militant; they stood before the throne, and the Lamb, clothed with white robes; clothed in the habits of such as amongst the Romans had fought, and conquered, and triumphed; and to this end they are said to have carried palms, the ensigns of victory, in their hands.
Related Commentaries of Revelation 7:9
Revelation 7:9
9 After this I beheld, and, lo, a great multitude, which no man could number, of all nations, and kindreds, and people, and tongues, stood before the throne, and before the Lamb, clothed with white robes, and palms in their hands;