Reference for Menachot 78:4

אמר שמואל משמיה דלוי חוטי צמר פוטרין בשל פשתן

but 'twisted cords'<span class="x" onmousemove="('comment',' In the plural.');">⁵</span> implies four; one must therefore twist them into a cord, but from the middle they must hang down in separate threads.<span class="x" onmousemove="('comment',' Or: 'that which is used for winding shall be of it', i.e., the thread that is wound around the others is included in the number of threads.');">⁶</span>

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