Revelation 6:11, 7:9,13,14, 22:14
11A white robe was given to each one of them. And they were told to rest a little longer until their number would be complete, when their fellow servants and their brothers would be put to death as they were.
The Church in Heaven
9After these things I looked, and there was a great multitude that no one could count, from every nation, tribe, people, and language, standing in front of the throne and of the Lamb, clothed with white robes, and with palm branches in their hands.
13One of the elders spoke to me and said, “These people dressed in white robes, who are they and where did they come from?”
14And I answered him, “Sir, you know.”
And he said to me:
These are the ones who are coming out of the great tribulation.
They have washed their robes and made them white in the blood of the Lamb.
14Blessed are those who wash their robes, so that they may have the right to the Tree of Life and so that they may enter through the gates into the city.