Reference for Chullin 108:24
ולא
We have learnt: A string which hangs over from the texture of a bed, [that is of any length] up to five handbreadths, is clean.<span class="x" onmousemove="('comment',' V. Kelim XIX, 2. If the bed was rendered unclean, this piece of string which has not yet been cut away from the texture of the bed would not be unclean, for it is insignificant. If, however, it was more than five handbreadths in length it would be unclean, for it would then be of some use - indeed, with this length of string they used to tie up the Passover lambs and hang up the beds. If it was more than ten handbreadths in length it would be clean, for it is considered independent from the texture, and hence cut away from it, and it is established law that a string by itself cannot be rendered unclean.');"><sup>9</sup></span>