Amen, therefore we have the apostle's direction found in
2 Thessalonians 2:15.
Therefore, brethren, stand fast, and hold the traditions which ye have been taught, whether by "word," or our "epistle." The Apostle Paul admonishes the church in Thessaloniki to adhere to the paradosis "παράδοσις" of the elders, which would of been Jesus Christ, and the founding apostles. He would've NEVER considered teaching the commandments of "men." Since the Apostle Paul knew full well the words of Christ found in
Mark 7:8-9.
"For laying aside the commandment of God, ye hold the tradition of men, as the washing of pots and cups: and many other such like things ye do. And he said unto them, Full well ye reject the commandment of God, that ye may keep your own tradition."
The Apostle Peter associated the epistles of the Apostle Paul with Holy scripture,
2 Peter 3:15–16. This shows that the Apostles brought forth issues which were a mystery in the Old Testament to become plain to the converts to Christianity. Yet, the Judaizers, as well as the Antinomians tried to ignore this New Testament fact, bringing destruction upon themselves, and anyone who would be lead away by their teachings.