Thematic Bible: Who serves God

After this I looked, and behold, a great multitude which no one could count, from every nation and all tribes and peoples and tongues, standing before the throne and before the Lamb, clothed in white robes, and palm branches were in their hands; and they cry out with a loud voice, saying, "Salvation belongs to our God who sits on the throne, and to the Lamb." And all the angels were standing around the throne and around the elders and the four living creatures; and they fell on their faces before the throne and worshipped God, read more.
saying, "Amen! Blessing and glory and wisdom and thanksgiving and honor and power and might be to our God for ever and ever! Amen." Then one of the elders addressed me, saying, "Who are these, clothed in white robes, and where have they come from?" I said to him, "Sir, you know." And he said to me, "These are they who have come out of the great tribulation; they have washed their robes and made them white in the blood of the Lamb. Therefore, they are before the throne of God and serve him day and night in his temple; and he who sits on the throne will spread his tent over them.