What is the earliest mention of the Three Pillars of Catholicism?

I was fascinated to read in Peter Turner's answer to the question [Why does the Roman Catholic Church not hold to the perspicuity of Scripture?](https://christianity.stackexchange.com/questions/54274/why-does-the-roman-catholic-church-not-hold-to-the-perspicuity-of-scripture) the following claim: >Catholics have always held there to be three pillars, Sacred Scripture, Sacred Tradition and Magisterial Teaching. These three in concert comprise the deposit of Faith. What is the earliest record that we have of the pillars being referred to together in this way? **edit:** let me clear, I'm not hung up on the specific word "pillars", but that the deposit of Faith is clearly defined as consisting of the three aforementioned elements.