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Curated Torah sources across every topic, from classical texts to contemporary responsa.
Medical Alert Devices on Shabbat
Sources address whether medical devices worn on the body may be taken into a public domain on Shabbat, weighing the laws of carrying against the principle of pikuach nefesh (saving life). The discussion includes the halakhic status of worn items, emergency medical necessity, and when life-preserving measures override ordinary Shabbat restrictions.
דְחוּיָה הִיא שַׁבָּת אֵצֶל סַכָּנַת נְפָשׁוֹת
Opening Food Packaging on Yom Tov
Sources address whether opening a sealed food package on Yom Tov is permitted when the wrapper becomes a usable vessel. The analysis draws on Shabbat and Yom Tov law governing vessel-making, container destruction, and the permissibility of actions necessary for food preparation.
מִשּׁוּם דְּקָא מְתַקֵּן מָנָא
Automatic Timers and Shabbat Appliances
Sources examine the halakhic principles governing work that begins before Shabbat and continues automatically on Shabbat itself. The discussion addresses which types of pre-Shabbat arrangements are permitted, the distinction between direct human action and mechanical continuation, and the practical considerations that apply to modern timer-controlled devices.
מותר להתחיל במלאכה בערב שבת סמוך לחשיכה אף על פי שאינו יכול לגומרה מבעוד יום והיא נגמרת מאליה בשבת
Walking Through Airport Security on Shabbat
Sources explore whether passing through a security body scanner on Shabbat is permitted, examining the principles of unintended consequences (davar she-ein mekavven) and inevitable results (psik reisha) that determine when a person's passive movement triggers a prohibited act.
דבר שאין מתכוין מותר
Milking Animals on Shabbat for Relief
Sources address whether milking an animal on Shabbat is permitted when done to relieve the animal's suffering rather than to collect milk for human use. The sources establish the principle of tza'ar ba'alei chayim (preventing animal suffering) as a basis for certain Shabbat exceptions, while also distinguishing between actions whose primary purpose is animal relief and those undertaken for human benefit.
צער בעלי חיים
Hearing Aids and Shabbat Observance
Sources address the permissibility of wearing and adjusting a hearing aid on Shabbat, applying rabbinic principles of medical necessity, muktzeh (forbidden objects), and the distinction between ordinary discomfort and conditions requiring care. The analysis draws on foundational Talmudic discussions of permitted medical activities and Shulchan Arukh rulings on assisting the ill.
מי שיש לו חולי של סכנה מצוה לחלל עליו את השבת
Opening a Refrigerator on Shabbat
Sources address whether one may perform an otherwise permitted action on Shabbat when it will foreseeably trigger a prohibited result. The discussion centers on the distinction between intentional acts and unintended consequences, and whether inevitable side effects render an action forbidden.
דבר שאין מתכוין מותר
Borer: Separation Without Immediate Need
Sources explore whether separating mixed items into distinct piles on Shabbat constitutes the melacha of borer when neither kind is needed for immediate use. The sources establish that borer requires three conditions: selecting one kind from another, doing so by hand, and performing the act for immediate consumption or use.
בורר ואוכל לאלתר — מותר; בורר ומניח — אסור
Extinguishing Lights on Shabbat for Sleep
Sources explore whether one may turn off a light on Shabbat to enable sleep, examining exemptions for cases of human need, the limitations of performing melachot with a shinui (altered manner), and the distinction between cases of genuine medical or personal necessity and ordinary comfort.
פָּטוּר
Extinguishing Lights on Shabbat for Sleep
These sources discuss whether one may turn off a light on Shabbat to enable sleep, examining the prohibition against extinguishing fire and the circumstances under which a non-Jew may perform the act or bodily need may permit leniency.
אַדַּעְתָּא דְנַפְשֵׁיהּ הוּ
Observing Shabbat in Extreme Daylight Conditions
These sources address the halakhic framework for observing Shabbat when ordinary sunset and twilight are absent or extremely prolonged, including the timing of candle-lighting, prayer services, and Havdalah. They establish the role of twilight (bein ha-shemashot) and astronomical markers in determining Shabbat's onset and conclusion.
זמן בין השמשות משתשקע החמה ואילך
Swimming and Water Use on Shabbat
These sources codify the rabbinic prohibition against swimming on Shabbat and explain its underlying concern: the fear that one might construct or repair a flotation device. The sources also clarify exceptions, such as bathing in a pool with contained walls, and discuss related restrictions on water use.
אין שטין על פני המים, גזירה שמא יעשה חבית של שייטין