Revelation 17:15

Then the angel [See verses 1,7] said to me, "The waters you saw, on which the prostitute sits [See verse 1] are races, crowds, nations and language groups.

Revelation 17:1

Then one of the seven angels, who had the seven bowls, came and spoke to me, saying, "Come [here]; I will show you the punishment [to fall] on the great prostitute who is situated on many bodies of waters.

Revelation 10:11

And they said to me [Note: The plural "they" may mean simply "it was told to me"], "You must prophesy again about many races, and nations, and language groups and kings."

Revelation 11:9

And people from among the races and tribes and language groups and nations will gaze at their dead bodies for three and a half days, and they will not permit their bodies to be buried.

Revelation 13:7-8

And he was given [the power] to wage war against the saints [i.e., God's holy people] and to conquer them; and he was given authority over every tribe, race, language group and nation.

Treasury of Scripture Knowledge

Summary

And he saith unto me, The waters which thou sawest, where the whore sitteth, are peoples, and multitudes, and nations, and tongues.

Bible References

Are

Revelation 10:11
And they said to me [Note: The plural "they" may mean simply "it was told to me"], "You must prophesy again about many races, and nations, and language groups and kings."
Revelation 11:9
And people from among the races and tribes and language groups and nations will gaze at their dead bodies for three and a half days, and they will not permit their bodies to be buried.
Revelation 13:7
And he was given [the power] to wage war against the saints [i.e., God's holy people] and to conquer them; and he was given authority over every tribe, race, language group and nation.