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Why is it prohibited to perform biya rishona on Friday night? The Gemara (גמרא) analyzes whether the prohibition stems from davar she'eino miskaven (unintentional melacha) making chabura, or because one is actually mechaven (intentional). This distinction determines whether the halacha (הלכה) follows Rabbi Yehuda or Rabbi Shimon.
The shiur provides an in-depth analysis of Kesubos 5b, focusing on the Gemara (גמרא)'s discussion about the prohibition of biya rishona (first marital relations) on Friday night. The central question revolves around understanding the precise reason for this prohibition and its halachic implications. The Gemara presents two approaches (leshonos) to explain why biya rishona might be prohibited on Shabbos (שבת). The first approach suggests that if one is mechaven (intentionally focused) on the Pesach (פסח), there's no problem, but if mechaven for the dam (blood), it could be prohibited according to Rabbi Yehuda while permitted according to Rabbi Shimon. The second approach holds that dam chabura mechaber (blood from a wound connects), making intention for blood problematic.
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Kesubos 5b
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