Thanks Lady Liberty!
Mrs. Witness, Just for fun, I think your dealing with an earthly vision. The 144,000 are sealed (past tense) not like the Jehovah Witness think that they are still sealing the 144,000. I think that the Great Crowd received their white robes but are not sealed and they will be added to the number of 144,000 and the souls under the alter in Rev 6. As far as I am concerned, below is an answer to the souls under the alter in Rev 6.
Earthly
Rev 7: 1 After this I saw four angels standing upon the four corners of the earth
3 saying: “Do not harm the earth or the sea or the trees, until after we have sealed the slaves of our God in their foreheads.”
4 "And I heard the number of those who were sealed, a hundred and forty-four thousand, sealed out of every tribe of the sons of Israel:"
9 "After these things I saw, and, look! a great crowd, which no man was able to number,"
Rev6: 9 And when he opened the fifth seal, I saw underneath the altar the souls of those slaughtered because of the word of God and because of the witness work that they used to have.
The souls asked a question and the received a reply:
Rev 6: 11 And a white robe was given to each of them; and they were told to rest a little while longer, until the number was filled also of their fellow slaves and their brothers who were about to be killed as they also had been.
After chapter 7, I am not too sure where they are! maybe they are under the alter with the other souls. There really is not enough information from these scriptures to prove anything but they are on earth receiving white robes and getting sealed. Although later , I do not think the great crowd,earthly group, is rendering sacred service day and night on the earth because that's would be a lot of hours! and I am getting tired.
There is something about the Revelation 19:1
There is also something else about the prayers! I get back to you.