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# [[Kneading]] flour and water is a violation of the biblical prohibition of Losh ([[kneading]]).<ref> As is evident from gemara [[Shabbat]] (18a), mixing flour and water is a violation of Losh (Menuchat Ahava 9:1). Chut HaSheni ([[Shabbat]] vol 1 pg 105) defines Losh as the prohibition to mix two ingredients using a liquid to form a dough. </ref> | # [[Kneading]] flour and water is a violation of the biblical prohibition of Losh ([[kneading]]).<ref> As is evident from gemara [[Shabbat]] (18a), mixing flour and water is a violation of Losh (Menuchat Ahava 9:1). Chut HaSheni ([[Shabbat]] vol 1 pg 105) defines Losh as the prohibition to mix two ingredients using a liquid to form a dough. </ref> | ||
==Combining the ingredients== | ===Combining the ingredients=== | ||
# Just as it is forbidden to knead two ingredients together so too it is forbidden to pour one onto the other so that they will mix automatically. Therefore it is forbidden to pour water onto flour or flour onto water on [[Shabbat]]. <ref> In Gemara [[Shabbat]] (18a) there is a dispute whether one is liable for violating Losh by simply pouring liquid into flour or only if one both pours in the water and mixes it. The majority of the Rishonim hold that one isn't biblically liable until one has both poured in water and mixed it into dough (Mishna Brurah 321:50), nonetheless, Mishna Brurah 321:57 (quoting the | # Just as it is forbidden to knead two ingredients together so too it is forbidden to pour one onto the other so that they will mix automatically. Therefore it is forbidden to pour water onto flour or flour onto water on [[Shabbat]]. <ref> In Gemara [[Shabbat]] (18a) there is a dispute whether one is liable for violating Losh by simply pouring liquid into flour or only if one both pours in the water and mixes it. The majority of the Rishonim (Rif, Rambam, Rosh, Ramban, and Ran, cited by Shaar haTziyun 321:57) hold that one isn't biblically liable until one has both poured in water and mixed it into dough (Mishna Brurah 321:50), nonetheless, Mishna Brurah 321:57 (quoting the Magen Avraham) there is a rabbinic prohibition even for just pouring liquid into flour or the opposite. This is also the ruling of Shemirat [[Shabbat]] KeHilchata 8:5, 39 Melachos (by Rabbi Ribiat, vol 1, pg 531), and Menuchat Ahava 9:1. </ref> | ||
===Bar Gibul=== | |||
# There is a distinction between something which is bar gibul, meaning mixed easily and something which is lav bar gibul which doesn't mix easily. <ref> The gemara Shabos 155b distinguishes between what is known as a '''Bar Gibul''' as opposed to a '''Lav Bar Gibul'''. The basic distinction between the two is that a bar gibul is something which mixes easily upon addition of liquid, such as fine powder, flour, or sand, while a lav bar gibul is something that does not. <br /> | |||
* However, within the very definition of a lav bar gibul, there is a machlokes as to what its halachic status is. Rambam Shabbos 8:16 suggests that because these substances, such as ash or coarse sand never truly fuse with the substance it is being mixed with even when water is added and kneading is done, it is therefore not subject to the melacha altogether. Nonetheless, the Rambam (Shabbos 21:34) writes that would be a rabbinic concern of appearing as lishah. Mishnah Brurah 321:50 quotes this.<br /> Most poskim (Tosfos, Rosh, Rashba, Raavad, and Ran cited by Shaar hatziyun 321:60) however, understand that a lav bar gibul is still subject to the melacha of losh, and therefore in certain circumstances may be dealt with in an even more stringent manner than a bar gibul material, for it would be culpable simply upon addition of water, without any kneading, considering that the kneading does not accomplish anything of significance.</ref> | |||
==A mixture which was mixed before Shabbat== | ==A mixture which was mixed before Shabbat== | ||
# Even if the two ingredients were poured one upon another before [[Shabbat]] it is forbidden to knead them together on [[Shabbat]]. <ref>Shemirat [[Shabbat]] KeHilchata 8:6 based on Beiur Halacha 321:15 s.v. Ein </ref> | # Even if the two ingredients were poured one upon another before [[Shabbat]] it is forbidden to knead them together on [[Shabbat]]. <ref>Shemirat [[Shabbat]] KeHilchata 8:6 based on Beiur Halacha 321:15 s.v. Ein </ref> | ||
# If two ingredients were kneaded together before [[Shabbat]], it is permissible to add liquid and even mix slowly. <ref> | # If two ingredients were kneaded together before [[Shabbat]], it is permissible to add liquid and even mix slowly. <ref> Shulchan Aruch 321:15, Mishna Brurah 321:58, Shemirat [[Shabbat]] KeHilchata 8:7 </ref> | ||
# Therefore, if oil separated from peanut butter and floats on top of it, it's permissible to remix it. It would even be permissible to add more liquid more forbidden to add more solids. <ref>Shemirat [[Shabbat]] KeHilchata 8:7 </ref> | # Therefore, if oil separated from peanut butter and floats on top of it, it's permissible to remix it. It would even be permissible to add more liquid more forbidden to add more solids. <ref>Shemirat [[Shabbat]] KeHilchata 8:7 </ref> | ||
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==Cooked foods== | ==Cooked foods== | ||
# | # Many hold that there is no prohibition of losh on a cooked food. Therefore, one may mix margarine into a baked potato or mix cinnamon or raisins into a cooked cereal (like oatmeal).<ref> Shulchan Aruch 321:19 rules based on the Rambam (responsa 109) that one may stir a dish of grits and meat and mash them so that they dissolve and form into one mass. Bach 321 questions the Rambam and says that one may only stir gently. Magen Avraham 321:28 agrees. However, the Taz 321:14 writes that since the meat and grits have been mixed with water and cooked before shabbos, there is no problem of losh in mixing it again. Chazon Ish 58:9 agrees if there is some liquid there from before Shabbos, one may then put in more on Shabbos. Biur Halacha 321:14 s.v. shema adds another reason to be lenient with stirring food that is already cooked; since it is already fit for eating, the kneading becomes part of the process preparing it for eating, derech achila, and would be permitted if you stirred a little bit at a time. Mishna Brura 321:77 advises following the strict views of the Bach and Magen Avraham. Chazon Ish 58:9 allows stirring even vigorously. 39 Melachos (pg. 540) writes that you can mix margarine into a baked potato. Shemirat Shabbos KeHilchata (8:24) agrees and adds (8:25) that you can mix cinnamon or raisins into oatmeal.<br/> </ref> | ||
==Mashing a banana== | ==Mashing a banana== | ||
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==Completely Absorbed== | ==Completely Absorbed== | ||
# When one substance becomes completely absorbed into the other so that there isn't a noticeable difference in the consistency of the liquid, there is no problem of lisha. For example, one may add instant coffee or hot cocoa to a cup of hot water.<ref> Chazon Ish 58:9, Sh”t Iggerot Moshe OC 4:74: Losh 1 </ref> | # When one substance becomes completely absorbed into the other so that there isn't a noticeable difference in the consistency of the liquid, there is no problem of lisha. For example, one may add instant coffee or hot cocoa to a cup of hot water (as long as there is no problem of bishul).<ref> Chazon Ish 58:9, Sh”t Iggerot Moshe OC 4:74: Losh 1, Shemirat Shabbat Kehilchita 8:29 </ref> | ||
==Other examples== | ==Other examples== | ||
# | # If one needs to wash his hands or urinate on the ground, he should look for an area without any loose sand or dirt. In case of need however, one may be lenient.<ref> The Mishna Brurah 321:57 cites the Magen Avraham that it is forbidden to urinate on mud because of losh and the same would be true of loose dirt or sand, even though it is unintended. He also cites the Beit Meir who is lenient in a case of need, to urinate even upon mud since he rules like R’ Yosi Bar Yehuda (cited in Masechet Shabbat 155b) that it is only dirabanan if you don't mix but merely pour water. Mishna Brura concludes that one may be lenient in case of need when the mud doesn’t belong to you, since one doesn’t benefit from the dirt mixing with the liquid. Kitzur S”A 80:14 and Menuchat Ahava 2:9:2: pg. 287 agree that if possible one should be careful. See also Ketzot Hashulchan 130:8.<br/> </ref> | ||
# It is forbidden to pour water on sand. Therefore, children playing in a sandbox should not pour water into it.<ref> Rambam (Shabbos 8:16) based on the gemara Shabbos 18a writes that kneading water and dirt is forbidden from the torah as a tolada of losh. Based on that, Shemirat Shabbos KeHilchata 16:4, Children in Halacha (Rabbi Simcha Bunim, pg 137-8), and 39 Melachos (Rabbi Ribiat, vol 2: pg 253-254) write that children who are playing in a sandbox may not pour water into it. <br/> The Gemara (155b) cites a dispute as to when one would have violated losh. According to Rebbi, pouring water into flour is enough, while according to Rabbi Yosi bar Yehuda, one isn’t liable until he kneads them together to form dough. The Rif (67b), the Rambam (21:34) and the Rosh (24:3) rule like R’ Yosi bar Yehuda that it is only forbidden midirabanan to pour water without mixing it, while the Yereim (Ch. 274, 133b), the Teruma (Ch. 220), the Semag (Prohibition 65, lash) and the Semak (Ch. 280) hold like Rebbe. The primary opinion of Shulchan Aruch 321:16 is like R’ Yosi, however, he also cites the opinion of Rebbi. Chacham Ovadia Yosef (Livyat Chen 67) and Menuchat Ahava (vol. 2: 9: note 9) are lenient. Rama is strict and this view is accepted by the Ben Ish Chai (Mishpatim 18) and Kaf Hachayim (324:14). <br/> | |||
</ref> | |||
==Links== | |||
* [http://www.yutorah.org/lectures/lecture.cfm/749816/Rabbi_Zvi_Sobolofsky/Losh Rabbi Zvi Sobolofsky] on Losh | |||
* [http://rabbikaganoff.com/archives/289 Rabbi Yirmiyohu Kaganoff] | |||
==Sources== | ==Sources== | ||
<References/> | <References/> | ||
[[Category:Shabbat]] | [[Category:Shabbat]] | ||
