Revelation 3:3-7

So remember what you have received and heard; and keep it, and repent. Then if you are not alert, I will come like a thief, and you will not know at what hour I will come to you.

But you have a few people in Sardis who have not soiled their garments; and they will walk with Me in white, for they are worthy.

The one who overcomes will be clothed the same way, in white garments; and I will not erase his name from the book of life, and I will confess his name before My Father and before His angels.

The one who has an ear, let him hear what the Spirit says to the churches.’ Message to Philadelphia

“And to the angel of the church in Philadelphia write: He who is holy, who is true, who has the key of David, who opens and no one will shut, and who shuts and no one opens, says this: