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Text replacement - " Biblical" to " biblical"
===Rabbinic prohibition===
#Many Rishonim hold that it is rabbinically forbidden to tie a knot which is either professional or meant to last for more than 24 hours. Some Sephardim hold that a non-professional knot is only rabbinically forbidden if it meant to last a week. Some Rishonim hold that a knot which is permanent even if it's not professional is Biblical biblical prohibited.<ref>*According to Rashi, (Gemara [[Shabbat]] 112a), [[tying]] a knot that lasts forever is forbidden Deoritta, [[tying]] a knot that is untied after some time is forbidden Derabbanan, and [[tying]] a knot that is untied all the time is permitted. (For a precise explanation of Rashi see Bet Yosef 317:1 and Taz 317:1.) The Rosh 15:1 agrees. The Rif 41b, however, explains that a professional knot which is meant to last forever is forbidden Deoritta, a non-professional knot which is meant to last is forbidden Derabbanan, and a non-professional knot which is not meant to last is permitted. The Rambam 10:2 adds that a professional knot which is not meant to last is forbidden Derabbanan. S”A 317:1 and Yalkut Yosef 317:1-4 rule like the Rif, while the Rama and Mishna Brurah 317:5 and 14 are concerned both for Rashi and the Rif. Pri Megadim M”Z 317:3 and Mishna Brurah 317:5 writes that according to the Rambam even if it lasts a long time it’s permitted as long as it is not meant to last forever.
*The Bet Yosef 317:1 explains based on the Tur that a knot that lasts for less than a week is considered to be untied every day. Yalkut Yosef (vol 2 p. 555) agrees. Rama 317:1, however, quotes the Maharam MiRotenburg’s who says that a knot that lasts for more than a day is forbidden. Pri Megadim (E”A 317:2) and Mishna Brurah 317:6 clarify that one day means 24 hours. Sh”t Yabia Omer 8:39:8 agrees that one day means 24 hours for this halacha, unlike the Tal Orot who says that it goes by the halachic day. Taz 317:1, Eliyah Rabba 317:2 Aruch HaShulchan 317:8, and Kaf HaChaim 317:14 rule like the Maharam.</ref>

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