We don't have (and more's the pity!) R' Yehudah Hanassi's autograph copy of the Mishnah (well, okay, it's a controversial issue whether he actually wrote it or only arranged it orally), or Ravina and ...
This is a follow up to: Why was Torah sheBal Peh not allowed to be Written?. The Gemara in Temurah (14b) states that one may not write Torah sheBal Peh. It then states an exception that was made so ...
The Gemara states that it is forbidden to write down the Oral Torah : דרש רבי יהודה בר נחמני מתורגמניה דרבי שמעון בן לקיש, כתיב: +שמות ל"ד+ כתוב לך את הדברים האלה, וכתיב: +שמות ל"ד+ כי ...