Revelation 7:9

After this, I saw, and beheld a great multitude, which no one could number, out of every nation, and tribe, and people, and language, standing before the throne, and before the Lamb, clothed in white robes, and palms in their hands;

Revelation 5:9

And they sung a new song, saying, Worthy art thou to take the scroll, and to open the seals of it; for thou wast slain, and hast redeemed us to God by thy blood, out of every tribe, and language, and people, and nation;

Revelation 6:11

And there were given to each of them white robes; and it was said to them, that they should rest yet a while, till the number of their fellow-servants and brethren who should be killed, as they had been, should be completed.

Revelation 3:4-5

But you have a few names in Sardis, who have not polluted their garments: and they shall walk with me in white, for they are worthy.

Revelation 3:18

I counsel you to buy of me gold tried in the fire, that you may be rich; and white apparel, that you may be clothed, and that the shame of your nakedness may not appear; and anoint your eyes with eye-salve, that you may see.

Revelation 4:4

And round about the throne there were twenty-four thrones; and on the thrones, twenty-four elders sitting, clothed with white apparel; and upon their heads golden crowns.

Revelation 5:11

And I beheld, and heard the voice of many angels round about the throne, and of the living creatures, and of the elders: and the number of them was myriads of myriads, and thousands of thousands;

Revelation 7:13-15

And one of the elders answered, saying to me, As for those who are clothed with white apparel, who are they, and whence do they come?

Revelation 11:15

And the seventh angel sounded, and there were great voices in heaven, saying, The kingdoms of the world are become the kingdoms of our Lord, and of his Christ; and he shall reign for ever and ever.

Treasury of Scripture Knowledge

Summary

After this I beheld, and, lo, a great multitude, which no man could number, of all nations, and kindreds, and people, and tongues, stood before the throne, and before the Lamb, clothed with white robes, and palms in their hands;

Bible References

No man

Revelation 5:11
And I beheld, and heard the voice of many angels round about the throne, and of the living creatures, and of the elders: and the number of them was myriads of myriads, and thousands of thousands;
Revelation 11:15
And the seventh angel sounded, and there were great voices in heaven, saying, The kingdoms of the world are become the kingdoms of our Lord, and of his Christ; and he shall reign for ever and ever.

Of all

Revelation 5:9
And they sung a new song, saying, Worthy art thou to take the scroll, and to open the seals of it; for thou wast slain, and hast redeemed us to God by thy blood, out of every tribe, and language, and people, and nation;