Reference for Zevachim 37:5

ותיפוק ליה משום חציצה בשמאל א"נ שלא במקום עבודה

R'Judah the son of R'Hiyya said: They learnt this only of a reed, but a small belt<span class="x" onmousemove="('comment',' Used as a bandage.');">⁷</span> constitutes an excess garment.<span class="x" onmousemove="('comment',' Which is forbidden, supra 18a.');">⁸</span>

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