Revelation 3:7-12

7 “To the angel of the assembly in Philadelphia write:  "He who is holy, he who is true, he who has the key of David, he who opens and no one can shut, and who shuts and no one opens, says these things:

8 “I know your works (behold, I have set before you an open door, which no one can shut), that you have a little power, and kept my word, and didn't deny my name.  9 Behold, I give of the synagogue of Satan, of those who say they are Jews, and they are not, but lie. Behold, I will make them to come and worship before your feet, and to know that I have loved you.  10 Because you kept my command to endure, I also will keep you from the hour of testing, which is to come on the whole world, to test those who dwell on the earth.  11 I am coming quickly! Hold firmly that which you have, so that no one takes your crown.  12 He who overcomes, I will make him a pillar in the temple of my God, and he will go out from there no more. I will write on him the name of my God, and the name of the city of my God, the new Jerusalem, which comes down out of heaven from my God, and my own new name.