Revelation 1:11 saying, " What you see, write in a book and send to the seven assemblies : to Ephesus, Smyrna, Pergamum, Thyatira, Sardis, Philadelphia, and to Laodicea." (WEB KJV WEY ASV BBE DBY WBS YLT NAS RSV NIV)
Revelation 3:7 "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: (WEB KJV WEY ASV BBE DBY WBS YLT NAS RSV NIV)