And that from a child thou hast known the holy scriptures, which are able to make thee wise unto 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 (KJV)
The interesting thing here, is when Shaul wrote this to young Timothy, the N.T. was not even written yet.