“Greet Prisca and Aquila, my fellow workers in Christ Jesus, who risked their own necks for my life, to whom not only I give thanks, but also all the churches of the Gentiles. And greet the ¹church, which is in their ²house.” (Romans 16:3-5a)

Rom 16:5¹ church
The church in Prisca and Aquila’s house must have been the church in Rome. When they were living in Ephesus (Acts 18:18-19), the church in Ephesus was in their house (1 Cor. 16:19). Wherever they were, they were willing to bear the burden of the practice of the church by opening their home.

Rom 16:5² house
Showing that the early saints met primarily in their houses. Such a practice corresponds with Acts 2:46 (see note 3 there) and 5:42.

“Aquila and Prisca greet you much in the Lord, with the ¹church, which is in their house.” (1 Cor. 16:19b)

1 Cor. 16:19¹ church
This means that when Aquila and Prisca lived in Ephesus, the church there met in their home (Acts 18:18-19, 26). When they lived in Rome, the church in Rome met in their home (Rom. 16:5; cf. Col. 4:15-16; Philem. 2).

“Greet the brothers in Laodicea, as well as Nymphas and the ¹church, which is in his house.” (Col. 4:15)

Col. 4:15¹ church
The church in the house of Nymphas was the local church in Laodicea, which met in Nymphas’s house. Such meetings in the saints’ homes afford every attending believer the opportunity to function, and they also strengthen the mutual fellowship among the saints.

“And to ¹Apphia the sister and to ¹Archippus our fellow soldier and to the ²church, which is in your house” (Philem. 2)

Philem. 2¹ Apphia and Archippus
According to the familial nature of this Epistle, Apphia must have been Philemon’s wife, and Archippus, his son.

Philem. 2² church
Philemon lived in Colossae (v. 2 cf. Col. 4:17; v. 10 cf. Col. 1:2; 4:9) and according to history was an elder of the church there. It must have been that the church in Colossae met in his house. Hence, it was the church in his house.