The White Robe Regiment

"Then a white robe was given to each of them. And they were told to rest a little longer until the full number of their brothers and sisters—their fellow servants of Jesus who were to be martyred—had joined them."

Revelation 6

"behold, a great multitude which no one could number, of all nations, tribes, peoples, and tongues, standing before the throne and before the Lamb, clothed with white robes; These are the ones who died in the great tribulation. They have washed their robes in the blood of the Lamb and made them white."

Revelation 7