Reference for Bava Batra 212:3

והא עשרין אמר לי אמר ליה דעדיפא כעשרין

as [one of] twenty. It was taught: R. Jose said: When brothers divide [an estate]<span class="x" onmousemove="('comment',' Into equal shares. ');">⁷</span> all of them acquire<span class="x" onmousemove="('comment',' And none may withdraw. ');">⁸</span>

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