Revelation 3:2-5

3:2 Wake up then, and strengthen what remains that was about to die, because I have not found your deeds complete in the sight of my God. 3:3 Therefore, remember what you received and heard, and obey it, and repent. If you do not wake up, I will come like a thief, and you will never know at what hour I will come against you. 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.