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We are continuing in siman 1. We have seen the Chayei Adam bring the opinions mentioned in the introduction: the machlokes Rabbi Yosi Ben Rabbi Yehuda and Rebbi, and the machlokes between the Rambam and other rishonim regarding the difference between bar gibul and not bar gibul. The Chayei Adam concluded that we are machmir regarding our understanding of bar gibul and not bar gibul.
The Chayei Adam continues, and writes that because we are machmir, one cannot put water together with the bran used as animal feed, because it is not a bar gibul, so one must be machmir that the mere placement of the ingredients already constitutes the issur of losh. According to the Rambam, it is an issur derabanan; according to most rishonim, it is an issur deoraysa.
The Chayei Adam writes that even if the water was placed together with the bran on erev Shabbos, it is still assur to mix it on Shabbos itself. However, we have learned that losh is one of the unique melachos in which Chazal permit certain actions with a shinui. Over here, the mixture can be stirred if it is stirred with a shinui. For example, one could pour it between containers such that the mixture eventually mixes together. Alternatively, one could stir in a criss cross fashion. People generally stir something in a circular motion, because it brings the out parts of the mixture towards the inside. If one stirs in a north-south-east-west pattern, it is a less effective way of mixing, so it is considered a shinui. This criss cross pattern is known as shesi va’arev in halacha.
There is a machlokes when a person performs shesi va’avrev whether they must remove the stirring stick from the mixture in between each direction. If we picture it, when moving between directions, unless one removes the stirring implement, one will inevitably come close to circular motions. Therefore, the Chazon Ish holds on must remove the stick between each direction. Neither the Mishnah Berurah, nor the Chayei Adam, mention the need to remove the stick.
We have learned that a belilah avah is assur mideoraysa, and belilah raka is assur miderabanan. This use of a shinui works even by a belilal avah, which is otherwise an issur deoraysa.
Summary
- The Chayei Adam paskens like Rabbi Yosi Ben Rabbi Yehuda, unless the items are not a bar gibul, in which case one is chayav for just placing the items together, like Rebbi.
- One should be machmir as well even by a bar gibul to be chosheish for Rebbi.
- Losh is muttar with a shinui. Examples of shinui would be pouring the mixture between two containers, or mixing it in a shesi va’arev pattern
