Reference for Eruvin 27:14

היתה של קש כו': מאי קמ"ל דאמרינן רואין היינו הך

Abaye remarked: R'Jose son of R'Judah holds the same view as his father in one respect and differs from him in another. He 'holds the same view as his father in one respect' in that he also adopts the principle of 'IS LOOKED UPON'; 'and differs from him in another', for whereas R'Judah holds [that a cross-beam may be] higher than twenty cubits,<span class="x" onmousemove="('comment',' From the ground (cf. Mishnah supra 2a ab init.) .');">¹⁴</span>

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