This great crowd will survive the great tribulation, and as they continue to be refreshed by “fountains of waters of life,” they will be raised to human perfection on earth. Sometime after the great tribulation, Hades will be emptied, and countless millions of other humans will be resurrected and have the opportunity to drink from those same waters of life. With this in mind, it would be correct to call the great crowd a firstfruits of the other sheep​—they are the first to ‘wash their robes and make them white in the blood of the Lamb’ with the hope of living forever on earth.​—Revelation 7:9, 10, 14, 17; 20:12, 13.

Finally, in the seventh month when the whole harvest was gathered in, there was the Festival of Booths, a time of joyful thanksgiving when the Israelites dwelt for a week in booths made of, among other things, palm branches. (Leviticus 23:33-43) Correspondingly, the great crowd, who are part of the great ingathering, give thanks before the throne with “palm branches in their hands.”​—Revelation 7:9.