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==What is a Bosis?== | ==What is a Bosis?== | ||
# an object upon which [[Muktzeh]] was left intentionally from before [[Shabbat]] and one intended that it stay there as [[Shabbat]] entered (during [[Bein HaShemashot]]), the object becomes a Bosis. <ref>Kitzur | # an object upon which [[Muktzeh]] was left intentionally from before [[Shabbat]] and one intended that it stay there as [[Shabbat]] entered (during [[Bein HaShemashot]]), the object becomes a Bosis. <ref>Kitzur Shulchan Aruch 89:1</ref> | ||
# One may not move a Bosis on [[Shabbat]] even if one needs its place or to use it for a permitted use. <ref>Kitzur | # One may not move a Bosis on [[Shabbat]] even if one needs its place or to use it for a permitted use. <ref>Kitzur Shulchan Aruch 89:1</ref> | ||
# If money or any other [[muktzeh]] item was left unintentionally on a table, one may learn on the table on [[Shabbat]] if it isn’t certain that learning there will cause the money to move. <Ref> The Mishnah ([[Shabbat]] 142b) states that if one wants to move a barrel on [[Shabbat]] and a rock was left on top of the barrel from before [[Shabbat]], he may tilt the barrel so that the rock falls off and then move the barrel. The Gemara limits this to a case in which the rock was left unintentionally; however, if the rock was left on top of the barrel intentionally, one may not move the barrel at all, as it is considered a bosis for [[muktzeh]], serving as a support of the [[muktzeh]] item. The Mishnah explains if one isn’t able to tilt off the rock, such as if there’s a fear of it breaking other barrels nearby when it is tilting off, one may move the barrel with the rock on top until one reaches a places where one can safely remove the rock. The Rambam ([[Shabbat]] 25:17), Tur, and S”A 309:4 codify this as Halacha. | # If money or any other [[muktzeh]] item was left unintentionally on a table, one may learn on the table on [[Shabbat]] if it isn’t certain that learning there will cause the money to move. <Ref> The Mishnah ([[Shabbat]] 142b) states that if one wants to move a barrel on [[Shabbat]] and a rock was left on top of the barrel from before [[Shabbat]], he may tilt the barrel so that the rock falls off and then move the barrel. The Gemara limits this to a case in which the rock was left unintentionally; however, if the rock was left on top of the barrel intentionally, one may not move the barrel at all, as it is considered a bosis for [[muktzeh]], serving as a support of the [[muktzeh]] item. The Mishnah explains if one isn’t able to tilt off the rock, such as if there’s a fear of it breaking other barrels nearby when it is tilting off, one may move the barrel with the rock on top until one reaches a places where one can safely remove the rock. The Rambam ([[Shabbat]] 25:17), Tur, and S”A 309:4 codify this as Halacha. | ||
* The Maharil ([[Shabbat]] n. 28) writes that one may learn on a table on which money was left because it isn’t a psik reisha that the coins will move. Olat [[Shabbat]] 309:2, Ba’eir Heiteiv 309:3, and Kaf HaChaim 309:11 codify this statement. Migdanot Eliyahu 2:69 infers that the case is where the coins didn’t make the table a bosis; otherwise, the Maharil should have been concerned with moving the table and not just the coins. Accordingly, Mishna Brurah (309:15 and Shaar HaTziyun 309:19) explains that had it been a psik reisha that one will move the coins, he would have to tilt off the money unless tilting it off would cause a loss (as in S”A 309:4). Additionally, he adds that the Maharil assumes that a psik reisha of a d’rabanan prohibition is forbidden, unlike the Trumat HaDeshen (see Magen Avraham 314:5). | * The Maharil ([[Shabbat]] n. 28) writes that one may learn on a table on which money was left because it isn’t a psik reisha that the coins will move. Olat [[Shabbat]] 309:2, Ba’eir Heiteiv 309:3, and Kaf HaChaim 309:11 codify this statement. Migdanot Eliyahu 2:69 infers that the case is where the coins didn’t make the table a bosis; otherwise, the Maharil should have been concerned with moving the table and not just the coins. Accordingly, Mishna Brurah (309:15 and Shaar HaTziyun 309:19) explains that had it been a psik reisha that one will move the coins, he would have to tilt off the money unless tilting it off would cause a loss (as in S”A 309:4). Additionally, he adds that the Maharil assumes that a psik reisha of a d’rabanan prohibition is forbidden, unlike the Trumat HaDeshen (see Magen Avraham 314:5). | ||
