The Holy Scriptures of the Old and New Testaments are the Word of God, the only rule of faith and obedience.
Scripture proofs: 2 Tim. 3:16; 2 Pet. 1:19-21; Eph. 2:20; Rev. 22:18-19; Isa. 8:20; Luke 16:29, 31; Gal. 1:8-9; 2 Tim. 3:15-16.
Source: The Constitution of the Reformed Presbyterian Church of North America, updated 2026, B-1.