Revelation 2:16-17

So change your hearts and lives. If you do not, I will come to you quickly and fight against them with the sword that comes out of my mouth. “Everyone who has ears should listen to what the Spirit says to the churches. “I will give some of the hidden manna to everyone who wins the victory. I will also give to each one who wins the victory a white stone with a new name written on it. No one knows this new name except the one who receives it.