“But though we, or an angel from heaven, preach any other gospel unto you than that which we have preached unto you, let him be accursed. As we said before, so say I now again, If any man preach any other gospel unto you than that ye have received, let him be accursed.” Galatians 1:8-9
Now find me another source of what the apostles taught other than scripture. If you can’t, that leaves you with the only source of what the apostles taught as found in scripture. AKA Sola Scriptura.
As expected you failed. Thanks for proving my point.