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===Rabbinic prohibition=== | ===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 | #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 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> | *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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#It is permitted to tie a slip knot or bow without a underlying knot even if it is tight and meant never to be undone.<ref>Shulchan Aruch (317:5), Beiur Halacha 317:5, Yalkut Yosef (317:11, [[Shabbat]], vol 2, pg 562), The [[Shabbos]] Home (Rabbi Simcha Cohen, vol 1, chap 13, pg 207) </ref> | #It is permitted to tie a slip knot or bow without a underlying knot even if it is tight and meant never to be undone.<ref>Shulchan Aruch (317:5), Beiur Halacha 317:5, Yalkut Yosef (317:11, [[Shabbat]], vol 2, pg 562), The [[Shabbos]] Home (Rabbi Simcha Cohen, vol 1, chap 13, pg 207) </ref> | ||
#After [[tying]] a bow knot (a bow on top of a single knot), as is common when [[tying]] one's shoes, some poskim hold that one may not tie a second bow on top of the bow knot.<ref>39 Melachos (Rabbi Ribiat, vol 3, pg 798) writes that it is forbidden as his definitive ruling, but in the footnote 49a he admits that since it is easy to undo he doesn't know why one should be strict.</ref> Others permit [[tying]] this knot since it can still be untied with a single hand by pulling on the end of the string.<ref>Orchot [[Shabbat]] (10:15) and footnote 28 </ref> | #After [[tying]] a bow knot (a bow on top of a single knot), as is common when [[tying]] one's shoes, some poskim hold that one may not tie a second bow on top of the bow knot.<ref>39 Melachos (Rabbi Ribiat, vol 3, pg 798) writes that it is forbidden as his definitive ruling, but in the footnote 49a he admits that since it is easy to undo he doesn't know why one should be strict.</ref> Others permit [[tying]] this knot since it can still be untied with a single hand by pulling on the end of the string.<ref>Orchot [[Shabbat]] (10:15) and footnote 28 </ref> | ||
#One should tie a bandage using a bow.<ref>Shemirat Shabbat KeHilchata, 35:23. Rabbi Neuwirth adds that using a safety pin is permissible as well.</ref> | |||
==A bow on top of a single knot== | ==A bow on top of a single knot== | ||
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#One may tie a bandage on a wound with a loose double knot if it is meant to be untied within 24 hours. If it is meant to last for more than 24 hours but less than 7 days, one should use a adhesive bandage or a bow knot, however, if that isn't possible then it's permissible.<ref>Shemirat Shabbat KeHilchata (in new editions 15:55) </ref> | #One may tie a bandage on a wound with a loose double knot if it is meant to be untied within 24 hours. If it is meant to last for more than 24 hours but less than 7 days, one should use a adhesive bandage or a bow knot, however, if that isn't possible then it's permissible.<ref>Shemirat Shabbat KeHilchata (in new editions 15:55) </ref> | ||
#One may tie a head covering with a loose double knot as long as one usually unties it everyday. However, if one usually removes it within [[untying]] the knot then it's forbidden to tie it even if this time one's intent is to untie within 24 hours.<ref>Shemirat Shabbat KeHilchata (in new editions 15:55) </ref> | #One may tie a head covering with a loose double knot as long as one usually unties it everyday. However, if one usually removes it within [[untying]] the knot then it's forbidden to tie it even if this time one's intent is to untie within 24 hours.<ref>Shemirat Shabbat KeHilchata (in new editions 15:55) </ref> | ||
#A bandage may not be tied using a double knot unless the bandage is meant to be switched daily, in which case, using a loose double knot is permissible.<ref>Shemirat Shabbat KeHilchata, 35:23.</ref> | |||
==Wrapping a string== | ==Wrapping a string== | ||
