It only needs one.
Second Letter of Paul to the Thessalonians
"15 So then, brethren, stand firm and hold to the traditions which you were taught by us, either by word of mouth or by letter."
I don't see how it can be stated any more plainly than that.
One would think that at the time of the cononization...done to fight heresy, that all things necessary to understand the Lord's complete revelations and live according to the way He deems right, would have been contained in the scriptures...else, why canonize at all? No, the rcc uses 'traditions' as the camels nose in the tent to unload all manner of ungodly rules upon humanity. As stated in Matthew Henry's commentaries....
"The Thessalonians are exhorted to stedfastness in their Christian profession, to hold fast the traditions which they had been taught, or the doctrine of the gospel, which had been delivered by the apostle, by word or epistle. As yet the canon of scripture was not complete, and therefore some things were delivered by the apostles in their preaching, under the guidance of the infallible Spirit, which Christians were bound to observe as coming from God; other things were afterwards by them committed to writing, as the apostle had written a former epistle to these Thessalonians; and these epistles were written as the writers were moved by the Holy Ghost. Note, There is no argument hence for regarding oral traditions in our days, now that the canon of scripture is complete, as of equal authority with the sacred writings. Such doctrines and duties as were taught by the inspired apostles we must stedfastly adhere to; but we have no certain evidence of any thing delivered by them more than what we find contained in the holy scriptures."