Thematic Bible: Who serves God

After these things I looked, and lo, a great multitude, which no man could number, out of all nations and kindreds and people and tongues, stood before the throne and before the Lamb, clothed with white robes, with palms in their hands. And they cried with a loud voice, saying, Salvation to our God sitting on the throne, and to the Lamb. And all the angels stood around the throne, and the elders, and the four living creatures, and they fell before the throne on their faces and worshiped God, read more.
saying, Amen! Blessing and glory and wisdom and thanksgiving and honor and power and might be to our God forever and ever. Amen. And one of the elders answered, saying to me, Who are these who are arrayed in white robes, and from where do they come? And I said to him, Sir, you know. And he said to me, These are the ones who came out of the great tribulation and have washed their robes, and have whitened them in the blood of the Lamb. Therefore they are before the throne of God, and they serve Him day and night in His temple. And He sitting on the throne will dwell among them.