Revelation 7:13-14

7:13 Then one of the elders asked me, “These dressed in long white robes – who are they and where have they come from?” 7:14 So I said to him, “My lord, you know the answer.” Then he said to me, “These are the ones who have come out of the great tribulation. They have washed their robes and made them white in the blood of the Lamb!

Revelation 3:4-5

3:4 But you have a few individuals in Sardis who have not stained their clothes, and they will walk with me dressed in white, because they are worthy. 3:5 The one who conquers will be dressed like them in white clothing, and I will never erase his name from the book of life, but will declare his name before my Father and before his angels.

Revelation 3:18

3:18 take my advice and buy gold from me refined by fire so you can become rich! Buy from me white clothing so you can be clothed and your shameful nakedness will not be exposed, and buy eye salve to put on your eyes so you can see!

Revelation 4:4

4:4 In a circle around the throne were twenty-four other thrones, and seated on those thrones were twenty-four elders. They were dressed in white clothing and had golden crowns on their heads.

Revelation 6:11

6:11 Each of them was given a long white robe and they were told to rest for a little longer, until the full number was reached of both their fellow servants and their brothers who were going to be killed just as they had been.