Reference for Sanhedrin 60:5

אמר לזה הוצרכתי השתא ומה עיקר ראיה בהדי הדדי אמר ר' יהושע בן קרחה לא בעינן הגדה מיבעיא

R. Johanan exclaimed: 'Is thatwhat I wanted? If R. Joshua b. Korha maintained that the essential witnessing[of the act need not have been simultaneous, is it necessary [to state this]in reference to the giving of evidence [in court]! However, he concluded,since you have ascended,<span class="x" onmousemove="('comment',' I.e., seeing that the degree of Rabbi has been conferred upon you. ');">⁹</span>

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