Rev.1.11  saying, "Write what you see in a book and send it to the seven churches, to Ephesus and to Smyrna and to Pergamum and to Thyatira and to Sardis and to Philadelphia and to Laodicea."
Rev.3.1  "And to the angel of the church in Sardis write: `The words of him who has the seven spirits of God and the seven stars. "`I know your works; you have the name of being alive, and you are dead.
Rev.3.4  Yet you have still a few names in Sardis, people who have not soiled their garments; and they shall walk with me in white, for they are worthy.

Hyper-concordance v1.1, by Sean Boisen. Scripture verses taken from the Revised Standard Version, copyright 1952, 1971.