Romans 16:3-5 — Greet Priscilla and Aquila my helpers in Christ Jesus:
Who have for my life laid down their own necks: unto whom not only I give thanks, but also all the churches of the Gentiles.
Likewise greet the church that is in their house. Salute my well-beloved Epaenetus, who is the firstfruits of Achaia unto Christ.
Priscilla and Aquila — Acts 18:1-2, 18, 24-26; 1 Corinthians 16:19; 2 Timothy 4:19
The Gentiles were thankful to Priscilla and Aquila for their service to Paul because they, and Paul, knew how valuable his ministry was to them.
Epaenetus — the first person Paul led to Christ
For the first two centuries, all churches were in homes.
laid down their own necks — perhaps by hiding Paul in Ephesus (Acts 19:23, 31; 20:1)