Revelation 3:7-8

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.