Revelation 3:3-5

3Go back to what you heard and believed at first; hold to it firmly. Repent and turn to me again. If you don’t wake up, I will come to you suddenly, as unexpected as a thief.

4“Yet there are some in the church in Sardis who have not soiled their clothes with evil. They will walk with me in white, for they are worthy.

5All who are victorious will be clothed in white. I will never erase their names from the Book of Life, but I will announce before my Father and his angels that they are mine.