Related for Menachot 82:2
ת"ר טלית שכולה תכלת כל מיני צבעונין פוטרין בה חוץ מקלא אילן
You may well infer from this, may you not, that one may detach the fringes from one garment [for insertion] into another garment?<span class="x" onmousemove="('comment',' But it is a subject of dispute between Rab and Samuel, infra.');"><sup>2</sup></span>
Tosefta Beitzah (Lieberman)
R. Shimon says: One may have a bed, a chair, a bench or pull up a chair on the Sabbath; and one don't even have to say: on a holiday.
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Shulchan Arukh, Orach Chayim
The number of the Tzitzit threads on all corners is 4 strings folded over, which is 8. If more were added, they are invalid. You should trim the tips of the 4 threads then insert them in the corner. Finally, double them over and then there will be 8.
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