Who are the souls crying out in Revelation 6:10?
The souls crying out in Revelation 6:10 are those who have been martyred for their faith. They are given white robes and told to rest until their fellow servants and brethren are also killed as they were. This is part of the fifth seal.
Les explains that these are the ones John sees in a prophetic light—all who have been martyred for their faith. They cry out, and white robes are given to every one of them. They are told to rest yet for a little season, until their fellow servants and brethren who should be killed as they were are fulfilled. Les notes this is all part of the fifth seal, before the sixth seal brings a great earthquake.
And they cried with a loud voice, saying, How long, O Lord, holy and true, dost thou not judge and avenge our blood on them that dwell on the earth?