Reference for Bava Batra 189:1
התם הן חסר הן יתיר א"ל מיהו רביע לא חשיב יתר מרביע חשיב
In that case<span class="x" onmousemove="('comment',' The sale of the land. ');"><sup>1</sup></span> [the seller explicitly] said to him, '[I sell you an area of a <i>kor</i>]<span class="x" onmousemove="('comment',' Kor = thirty se'ah. ');"><sup>2</sup></span>
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