New answers tagged bitul-batel-null
According to the explicit specifications of the halakhah, the only amount which is required by law to be removed is that of a kezayith. Or, if there are several pieces of hamess that, when gathered together, would equal the amount of a kezayith or more - in the same room - then it is required to remove them. (cf. Rambam, Mishneh Thorah, Hilkhoth Hamess ...
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