John 21:24-25
(Highlighting mine.)
There's no proof of anything there...Apparently you are assuming that since Jesus did many other things, it was necessary for you to know what they were...Jesus never said that...In fact, Jesus says the opposite:
Joh 21:25 And there are also many other things which Jesus did, the which, if they should be written every one, I suppose that even the world itself could not contain the books that should be written. Amen.
In fact, the verse you cited prior to this one confirms that what John testified (by word)(tradition to you guys) he also put the same words (tradition) in writing...
Joh 20:30 And many other signs truly did Jesus in the presence of his disciples, which are not written in this book:
Joh 20:31 But these are written, that ye might believe that Jesus is the Christ, the Son of God; and that believing ye might have life through his name.
Jesus did a lot of miracles that you don't know about...But everything Jesus did for your salvation was written for you and me to read...
The written scripture has EVERYTHING we need to know to attain Salvation...