#1.
Romans 1:5 By whom we have received grace and apostleship, for obedience to the faith among all nations, for his name:
1:6
Among whom are ye also the called of Jesus Christ:
I Cor 1:2 Unto the church of God which is at Corinth,
II Cor 1:1Paul, an apostle of Jesus Christ by the will of God, and Timothy our brother,
unto the church of God which is at Corinth...
Galatians 1:2 And all the brethren which are with me,
unto the churches of Galatia:...
Ephesians 1:1 Paul, an apostle of Jesus Christ by the will of God,
to the saints which are at Ephesus, and to the faithful in Christ Jesus:
Philippians 1:1 Paul and Timotheus, the servants of Jesus Christ,
to all the saints in Christ Jesus which are at Philippi, with the bishops and deacons:
Colossians 1:2 To the saints and faithful brethren in Christ which are at Colosse: Grace be unto you, and peace, from God our Father and the Lord Jesus Christ.
I Thess. 1Paul, and Silvanus, and Timotheus,
unto the church of the Thessalonians...
II Thessalonians Paul, and Silvanus, and Timotheus,
unto the church of the Thessalonians in God our Father and the Lord Jesus Christ:
You get the idea. Salvation is found in Acts and solidified in the Epistles.