I don’t know if you missed the last time I posted John 20 so here it is:
John 20:30-31 NASB
Therefore many other signs Jesus also performed in the presence of the disciples, which are not written in this book; but these have been written so that you may believe that Jesus is the Christ, the Son of God; and that believing you may have life in His name.
Yes, those have been written, but there are other teachings that are not written.
I can’t remember exactly what it is, but Paul says that Jesus said something.....to me that is Holy Tradition. No where in the Bible is Christ directly quoted as saying it. I’ll find out exactly what it was and let you know.
Sort of funny — Paul quoting Jesus, and it’s the only place in the Bible that this saying appears.