Thematic Bible: Who serves God

After these things I saw a great army of people more than might be numbered, out of every nation and of all tribes and peoples and languages, taking their places before the high seat and before the Lamb, dressed in white robes, and with branches in their hands, Saying with a loud voice, Salvation to our God who is seated on the high seat, and to the Lamb. And all the angels were round about the high seat, and about the rulers and the four beasts; and they went down on their faces before the high seat, and gave worship to God, saying, read more.
So be it. Let blessing and glory and wisdom and praise and honour and power and strength be given to our God for ever and ever. So be it. And one of the rulers made answer, saying to me, These who have on white robes, who are they, and where did they come from? And I said to him, My lord, you have knowledge. And he said to me, These are they who came through the great testing, and their robes have been washed and made white in the blood of the Lamb. This is why they are before the high seat of God; and they are his servants day and night in his house: and he who is seated on the high seat will be a tent over them.