Reference for Sanhedrin 35:1

מאתים ושבעים ושבעה

[The population must be] two hundred and seventy-seven.<span class="x" onmousemove="('comment',' Tosef. III. Two hundred and thirty in accordance with R. Nehemia, and forty-seven held in reserve for increasing the number of the court of twenty-three, where one is uncertain and the rest equally divided, adding two at a time, up to a maximum of seventy or seventy-one, v. infra 40a. ');">¹</span> But has it not been taught: Rabbi said, [The population must be] two hundred and seventy-eight? — There is no difficulty: The one statement is according to R. Judah;<span class="x" onmousemove="('comment',' Requiring only seventy to constitute the Sanhedrin. ');">²</span>

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