According to the Mishna (Bechorot 1:7) the reason not to perform yibum nowadays is people don't have intention l'shem mitzva when performing yibum. Firstly I would like to know if there are any other ...
What are the sources for the Jewish law or "Halacha"? Is there any priority among these sources? In common practice, when a law is described, is the citation given form the main sources or derived ...