Revelation 7:13

13 One of the elders asked me, "Who are these people dressed in white robes, and where do they come from?"

Revelation 7:13 In-Context

11 All the angels stood around the throne, the elders, and the four living creatures. Then they threw themselves face downward in front of the throne and worshiped God,
12 saying, "Amen! Praise, glory, wisdom, thanksgiving, honor, power, and might belong to our God forever and ever! Amen!"
13 One of the elders asked me, "Who are these people dressed in white robes, and where do they come from?"
14 "I don't know, sir. You do," I answered. He said to me, "These are the people who have come safely through the terrible persecution. They have washed their robes and made them white with the blood of the Lamb.
15 That is why they stand before God's throne and serve him day and night in his temple. He who sits on the throne will protect them with his presence.
Scripture taken from the Good News Translation - Second Edition, Copyright 1992 by American Bible Society. Used by Permission.