'Seven Churches' in the Bible

saying, “Write on a scroll what you see [in this revelation], 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.”

As for the mystery of the seven stars which you saw in My right hand, and the seven golden lampstands: the seven stars are the angels (divine messengers) of the seven churches, and the seven lampstands are the seven churches.

“To the angel (divine messenger) of the church in Ephesus write:“These are the words of the One who holds [firmly] the seven stars [which are the angels or messengers of the seven churches] in His right hand, the One who walks among the seven golden lampstands (the seven churches):