Reference for Bava Batra 181:2

ת"ר אין משתכרים בארץ ישראל בדברים שיש בהן חיי נפש כגון יינות שמנים וסלתות

In Palestine it is not permitted to make a profit [as middleman]<span class="x" onmousemove="('comment',' The producer must sell direct to the consumer. ');">³</span> in things which are life's necessaries, such as, for instance, wines, oils and the various kinds of flour. It has been said about R. Eleazar b. Azariah that he used to make a profit in wine and oil. In [the case of] wine he held the same opinion as R. Judah;<span class="x" onmousemove="('comment',' R. Judah b. Bathyra who allowed profiting in wine because by raising its price, consumption and consequent levity are diminished. ');">⁴</span>

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