Thematic Bible: Who serves God

After this I looked, and there was a vast multitude from every nation, tribe, people, and language, which no one could number, standing before the throne and before the Lamb. They were robed in white with palm branches in their hands. And they cried out in a loud voice: Salvation belongs to our God, who is seated on the throne, and to the Lamb! All the angels stood around the throne, the elders, and the four living creatures, and they fell on their faces before the throne and worshiped God, read more.
saying: Amen! Blessing and glory and wisdom and thanksgiving and honor and power and strength, be to our God forever and ever. Amen. Then one of the elders asked me, "Who are these people robed in white, and where did they come from?" I said to him, "Sir, you know." Then he told me: These are the ones coming out of the great tribulation. They washed their robes and made them white in the blood of the Lamb. For this reason they are before the throne of God, and they serve Him day and night in His sanctuary. The One seated on the throne will shelter them: