Revelation 3:1-3

And to the angel of the church of Sardis write:
He who has the seven spirits of God,
and the seven stars, says this:
I know your deeds,
that you have a name that you are alive,
but you are dead.
Wake up, and strengthen the things that remain,
which were about to die;
for I have not found your deeds completed in the sight of My God.
Remember therefore what you have received and heard;
and keep it and repent.
If therefore you will not wake up,
I will come like a thief,
and you will not know at what hour I will come upon you.