First of all you failed to show where the apostles taught the assumption or veneration of saints. Nonetheless, I’ll issue another challenge.
“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
Do you know of any other source of what the apostles taught? Paul also commended the Bereans for because they “searched the scriptures daily” to see if what he taught was correct. And please don’t waste your time trying to tell me that the RCC somehow has been handed down some unwritten “tradition” that the apostles didn’t record. That can only be considered hearsay.
I am still waiting for your proof that the apostles taught sola scriptura.