Sanhedrin 4: Text vs. Tradition
Cases of whether one should focus on the pronunciation of a word as compared to its written version, for any number of cases where both are presented, when they are not the same. The dispute upholds both, truth be told. One example: How many walls are required for a kosher sukkah - based on the written/read word in the Torah. Also, which wins? It seems that pronunciation always does, so the Gemara explores if that is accurate.