“Sola Scriptura is a tradition of men. Can you show me where this doctrine originated? It is surely not biblical.”
Scripture = written record of the teachings and actions of the Prophets, Apostles and the Lord Himself.
If not Scripture, then what standard of faith do you propose?
Where in those records is Scripture held up to be the sole rule of faith?
"If not Scripture, then what standard of faith do you propose?"
The Bible, Tradition and the teaching Church expounding both.