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Curated Torah sources across every topic, from classical texts to contemporary responsa.
Lizards in Jewish Law and Purity
These sources examine the halakhic classification of lizards and related crawling creatures (sheratzim) within Jewish law, including their status regarding ritual impurity, permitted uses of their hides, and their enumeration in the Torah's list of forbidden animals.
וְהָאֲנָקָה וְהַכֹּחַ וְהַלְּטָאָה
Identifying and Maintaining Kosher Foods
Sources establish the biblical categories of permitted and forbidden animals, fish, and birds, and explain the practical identifying signs (simanim) used to determine kosher status. The sources progress from Torah's foundational rules through rabbinic analysis and medieval codification into a comprehensive legal framework for keeping kosher.
סִימָנֵי בְּהֵמָה וְחַיָּה נֶאֶמְרוּ מִן הַתּוֹרָה
Why Kohanim Must Maintain the Altar Fire
Sources explore the halakhic requirement that kohanim continuously kindle and maintain fire on the altar despite the descent of heavenly fire. The texts address the relationship between divine miracle and human obligation, the spiritual purpose of sustained priestly service, and the distinction between miraculous and ordinary fire.
אֵשׁ תָּמִיד תּוּקַד עַל הַמִּזְבֵּחַ
The Kashrut of Sturgeon: A Halachic Debate
This collection examines the longstanding halachic question of whether sturgeon is a permitted fish under Jewish dietary law. Sources range from biblical foundations on fish signs (fins and scales) through rabbinic definitions in the Talmud, medieval codifications by the Rambam, and early modern responsa from the Noda BiYehudah and Chatam Sofer, all debating whether the sturgeon's ganoid scutes qualify as true kaskeset (scales).
כל שיש לו סנפיר וקשקשת טהור
Pikuach Nefesh and Forbidden Materials in Medical Life-Saving
Jewish law addresses whether life-saving medical procedures using ordinarily forbidden substances—such as non-kosher animal organs in transplantation—are permissible under the principle of pikuach nefesh. Sources from Tanakh through the Acharonim establish that preserving life overrides virtually all Torah prohibitions, including dietary laws, when a person faces mortal danger.
וְחַי בָּהֶם וְלֹא שֶׁיָּמוּת בָּהֶם