Reference for Bava Batra 308:8

אמר ליה לא שאני אומר דברי הכל מודה בשטר שכתבו אינו צריך לקיימו והא מיפלג פליגי דתנן אין נאמנין לפוסלו דברי ר' מאיר וחכמים אומרים נאמנין

Are we to assume [asked Resh Lakish, that] this<span class="x" onmousemove="('comment',' The statement that one is to be guided by the deed (v. previous note). ');">²⁶</span> is [in accordance with the opinion of] R. Meir, who stated that where one admits that he wrote the deed, attestation is not required, but not [in accordance with the view of] the Rabbis?<span class="x" onmousemove="('comment',' Is it likely that Bar Kappara's Mishnah represents the view of an individual only? ');">²⁷</span> — He [R. Johanan] replied to him: No; because I maintain [that] all<span class="x" onmousemove="('comment',' Even the Sages. (This statement is modified infra.) ');">²⁸</span> agree<span class="x" onmousemove="('comment',' Lit., 'the words of all'. ');">²⁹</span>

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