Revelation 3:4-9

4But you have a few people in Sardis who have not defiled their clothes, and they will walk with me in white, because they are worthy.

5“In the same way, the one who conquers will be dressed in white clothes, and I will never erase his name from the book of life but will acknowledge his name before my Father and before his angels.

6“Let anyone who has ears to hear listen to what the Spirit says to the churches.

7“Write to the angel of the church in Philadelphia: Thus says the Holy One, the true one, the one who has the key of David, who opens and no one will close, and who closes and no one opens:

8I know your works. Look, I have placed before you an open door that no one can close because you have but little power; yet you have kept my word and have not denied my name.

9Note this: I will make those from the synagogue of Satan, who claim to be Jews and are not, but are lying — I will make them come and bow down at your feet, and they will know that I have loved you.