Reference for Nedarim 124:2
אמר רבא שרי ליה לצורבא מרבנן למימר לא יהיבנא אכרגא דכתיב (עזרא ז, כד) מנדה בלו והלך לא שליט למירמא עליהון וא"ר יהודה מנדה זו מנת המלך בלו זו כסף גולגלתא והלך זו ארנונא
and first to receive a good portion.<span class="x" onmousemove="('comment',' At a meal he must be served first. — Asheri: when sharing anything with an Israelite, the latter must divide the thing to be shared in two equal portions and give choice of pick to the priest. ');"><sup>3</sup></span> Raba said: A rabbinical scholar may declare, I will not pay poll-tax, for it is written, [also we certify to you, that touching any of the priests … or ministers of this house of God,] it shall not be lawful to impose mindah [tribute,] belo [custom,] or halak [toll,] upon them:<span class="x" onmousemove="('comment',' Ezra VII, 24. ');"><sup>4</sup></span>