Revelation 6:11 English Standard Version Anglicised (ESVUK)
11 Then they were each given a white robe and told to rest a little longer, until the number of their fellow servants[a] and their brothers[b] should be complete, who were to be killed as they themselves had been.
Revelation 7:9 English Standard Version Anglicised (ESVUK)
A Great Multitude from Every Nation
9 After this I looked, and behold, a great multitude that no one could number, from every nation, from all tribes and peoples and languages, standing before the throne and before the Lamb, clothed in white robes, with palm branches in their hands,