Revelation 3:1-3

To the Church in Sardis.

I know your works. You have the reputation of being alive, but you are dead.

Wake up, and strengthen what remains and is about to die, for I have not found your works complete in the sight of my God.

Remember, then, what you received and heard. Keep it, and repent.

If you will not wake up, I will come like a thief, and you will not know at what hour I will come against you.