We do not ascribe this to Sacred Tradition, which is not a biblical concept.
Here’s the thing. You say that you “do not ascribe” to Sacred Tradition because it is “not a biblical concept.” Now, apart from St. Peter’s instruction that the letters of St. Paul are to be considered “Scriptural” (or, biblical), where is your biblical concept for ascribing to the rest of the New Testament?
Once again, you have created for yourself a convenient double standard.
You have no biblical mandate which allows you to determine Scripture. In fact, apart from St. Peter’s letter regarding St. Paul’s letters, you depend wholly on Tradition and the authority of the early Church (patristic and conciculor) to even give you the remaining sum of what you accept at “Scriptural” texts.
In hindsight, you may certainly appeal to the scholarly accounts, but in practical terms your postition is untenable because you have presupposed your definition of the “word of God.”
The Word of God is, indeed, a “biblical concept,” but you have—through your tradition— defined it in unbiblical terms. It is not, as you would assert, the other way around.
For instance, in the Old Testament, the “word of God” refers to the oral transmission of law and prophecy, not excluding, of course, the Commandments made on the stone tablets. It does not, as you would contend, limit itself to that which is expressly written and canonical.
Then, in the New Testament, we see “the Word” referencing Jesus Christ, Himself (Jn. 1:1). We see “the word of God” throughout the book of Acts referencing the ministry and the predominantly oral preaching authority of the apostles (Acts 4: 31, Acts 6:2, 7, Acts 8:14, Acts 13: 46 etc.). Then, we see the “word of God” referring again to prophecy in 1 Cor.14: 36. Reading further, we see the “word of God” used in a more metaphorical sense as the helmet of salvation and the sword of the Spirit (Eph. 6:17). In Philippians 1:14, St. Paul is very clear that “word of God” is being spoken among the brothers, not written. Once again in 1 Thess. 2:13, St. Paul emphasizes that the people are receiving the “word of God,” through the preaching of those commissioned to spread the Gospel. The examples go on. . .
So, it would seem that while we (and by “we,” I specifically mean the Church—not just those who agree with me) readily acknowledge Sacred Scripture as the “word of God,” there is no biblical concept (as you would demand) which exclusively defines “the word of God” as that which is written or that which is “biblical.”
The Catholic doctrine regarding the “word of God,” on the other hand, is entirely in concert with the “biblical concept.” We regard Scripture AND Tradition as “the word of God” which, not surprisingly, is entirely more “biblical” a concept than your tradition of Sola Scriptura. So, it would seem that your tradition is, in fact, the one that is an extra-biblical concept.
What I asked for was proof of Sacred Tradition that comes from Christ or the Apostles themselves. It did not seem like an unreasonable request. If there is something outside of the Bible that would be important to a believer, where did it come from? I have yet to see an extrabiblical tradition traced historically to Christ or his apostles that deals with anything resembling an essential doctrine.
Surely, having read all the “history,” you are well aware of the Tradition often referred to as The Real Presence. It has been mentioned before–the terms differ, but the biblical concept and the traditional “apostolic” doctrine are consistent.
Primary sources available upon request.