Reference for Eruvin 153:15

ואמאי דבר הניטל בשבת הוא ודבר הניטל בשבת אינו ממעט לא צריכא דחבריה בארעא

otherwise, one may use only that part<span class="x" onmousemove="('comment',' Of the top.');">³⁷</span> that was parallel to the reduction. What, however, is your view?<span class="x" onmousemove="('comment',' Lit., 'what is your desire', sc. whatever the assumption a difficulty arises.');">³⁸</span>

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