Reference for Bava Batra 105:4

האי גדר היכי דמי אילימא דמעיקרא לא הוו סלקי לה והשתא נמי לא סלקי לה מאי עבד ואלא דמעיקרא הוו סלקי לה והשתא לא סלקי לה טובא עבד לא צריכא דמעיקרא הוו סלקי לה ברווחא והשתא קא סלקי לה בדוחקא

If again we say that before people could climb it but now they cannot, he has done a great deal!<span class="x" onmousemove="('comment',' And we should not call it 'anything at all'. ');">⁷</span> — We must therefore say that before it could be climbed easily but now it can only be climbed with difficulty. How are we to picture the opening? If we say that before people could get through it and now too they can get through it, what has he done?<span class="x" onmousemove="('comment',' To improve the property. ');">⁶</span>

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