Rav Shaul(Paul) taught from the Tanach.”
Actually, they both referenced some books only existing in the Septuagint, that did not exist in the Tanach:
OLD TESTAMENT GUIDELINES: 1. The book must have been written, edited, or endorsed by a prophet. 2. The Old Testament books were endorsed by Christ and Paul. 3. The New Testament quotes all but seven of the Old Testament books. The Apocrypha, those books included in the Roman Catholic Canon, were never quoted in the New Testament.
This is a summary of guidelines that were used in determining the canonicity of the books of the Bible.
shalom b'shem Yah'shua
Christ, Luke 24:27,44; John 5:39.
Paul, 2 Timothy 3:16.
(Obadiah, Nahum, Ecclesiastes, Song of Solomon, Esther, Ezra, and
Nehemiah. Some list only Esther, Ecclesiastes & Song of Solomon.)
The Apocrypha was accepted as part of the Catholic Canon at the Council of Trent in A.D. 1546.
And on whose authority were said guidelines promulgated? The Jewish/Protestant OT canon was decided at Jamnia in AD 90 -- the same council that rejected the entirety of the NT writings written to that point. Not an authority I care to give credit to or trust.
The Apocrypha, those books included in the Roman Catholic Canon, were never quoted in the New Testament.
Did you look at the link that I posted?
2. The Old Testament books were endorsed by Christ and Paul.
3. The New Testament quotes all but seven of the Old Testament books.
My point exactly with the link. If Christ, St. Paul, and others quoted/referenced the Deuterocanon (what you call the 'Apocrypha'), then that gives quite a bit of support to suggest they should be canonical.