Chapter 11 — Part I: The Creed — Article IX: The Holy Catholic Church; the Communion of Saints
Section 24. The private families of the faithful he also calls churches. The church in the family of Priscilla and Aquila he commands to be saluted; and in another place, he says: Aquila and Priscilla with the church that is in their house salute you much in the Lord. Writing to Philemon, he makes use of the same word.