This is important to understanding 2 Timothy 3:16: All Scripture is God-breathed and is useful for teaching, rebuking, correcting and training in righteousness.
Graphe is Scripture, and pasa is either "the whole" or "every."
Should theopneustos (God-breathed) be rendered as a predicate (AV, NIV, RSV) or as a qualifying adjective (RV)?
Does it mean Scripture as a whole or separate passages within Scripture?
The latter is in accordance with the general use of the singular noun, and must therefore be given due weight in the present passage. The absence of the article may point to the sense 'every,' but there are analogous cases where pas is used in a semi-technical phrase and where the meaning 'every' is ruled out (Acts 2:36 where all the house is clearly demanded; Ephesians 2:21, 3:15; Colossians 4:12). Yet in all these exceptions, pas draws attention to the partitive aspect of the expression, and if so, the present phrase may mean Scripture as viewed in each separate part of it.
Either way is grammatically possible. Why would Paul need to assure Timothy that inspired scriptures are profitable? But on the other hand, why would Timothy need to be assured, at this point, of the inspiration of the Scriptures?
Maybe it is the profitableness not the inspiration which Paul is pressing on Timothy. The significance of the conjuction kai has some bearing on the matter. Its normal meaning is 'and' as in NIV and is useful, whereas the RV translates it as also. Comparison with the use of kai in 1 Timothy 4:4 would support the meaning 'and' here and would seem most probable, so the NIV and RSV are more in harmony with both grammar and syntax. Timothy is not being informed of the inspiration of Scripture, as Jews know this already, but he is being reminded that the basis of its profitableness lies in its inspired character.
(The Pastoral Epistles: And Introduction and Commentary by Donald Guthrie, 1990, Pages 175-176 @ https://www.google.com/books/edition/The_Pastoral_Epistles/q2nMrKGbj30C?hl=en&gbpv=1&bsq=graphe)
All that has a place among the hiera grammata, just because it is God-breathed, is profitable for the guiding of both faith and life.
(The Origin of the Bible: Newly Updated by F. F. Bruce, J. I. Packer, Philip W. Comfort, and Carl F. H. Henry, 2020. The Inspiration of the Bible by J. I. Packer. Pages 30.)