Q.6: What things are chiefly contained in the Holy Scriptures?
A. The Holy Scriptures chiefly contain what man ought to believe concerning God, and what duty God requires of man.
Hold fast the pattern of sound words which you have heard from me, in faith and love which are in Christ Jesus. 2 Timothy 1:13
And that from childhood you have known the Holy Scriptures, which are able to make you wise for salvation through faith which is in Christ Jesus. All Scripture is given by inspiration of God, and is profitable for doctrine, for reproof, for correction, for instruction in righteousness.
2 Timothy 3:15-16