Kashrut from the Torah to the Mishnah "on one foot":
Jewish dietary laws have evolved, including from the Torah to the Mishnah. This source sheet looks at some of those ways that it changed.
Torah Rules for Kosher "Animals"
(א) וַיְדַבֵּ֧ר יהוה אֶל־מֹשֶׁ֥ה וְאֶֽל־אַהֲרֹ֖ן לֵאמֹ֥ר אֲלֵהֶֽם׃(ב) דַּבְּר֛וּ אֶל־בְּנֵ֥י יִשְׂרָאֵ֖ל לֵאמֹ֑ר זֹ֤את הַֽחַיָּה֙ אֲשֶׁ֣ר תֹּאכְל֔וּ מִכָּל־הַבְּהֵמָ֖ה אֲשֶׁ֥ר עַל־הָאָֽרֶץ׃(ג) כֹּ֣ל ׀ מַפְרֶ֣סֶת פַּרְסָ֗ה וְשֹׁסַ֤עַת שֶׁ֙סַע֙ פְּרָסֹ֔ת מַעֲלַ֥ת גֵּרָ֖ה בַּבְּהֵמָ֑ה אֹתָ֖הּ תֹּאכֵֽלוּ׃(ד) אַ֤ךְ אֶת־זֶה֙ לֹ֣א תֹֽאכְל֔וּ מִֽמַּעֲלֵי֙ הַגֵּרָ֔ה וּמִמַּפְרִיסֵ֖י הַפַּרְסָ֑ה אֶֽת־הַ֠גָּמָל כִּֽי־מַעֲלֵ֨ה גֵרָ֜ה ה֗וּא וּפַרְסָה֙ אֵינֶ֣נּוּ מַפְרִ֔יס טָמֵ֥א ה֖וּא לָכֶֽם׃(ה) וְאֶת־הַשָּׁפָ֗ן כִּֽי־מַעֲלֵ֤ה גֵרָה֙ ה֔וּא וּפַרְסָ֖ה לֹ֣א יַפְרִ֑יס טָמֵ֥א ה֖וּא לָכֶֽם׃(ו) וְאֶת־הָאַרְנֶ֗בֶת כִּֽי־מַעֲלַ֤ת גֵּרָה֙ הִ֔וא וּפַרְסָ֖ה לֹ֣א הִפְרִ֑יסָה טְמֵאָ֥ה הִ֖וא לָכֶֽם׃(ז) וְאֶת־הַ֠חֲזִיר כִּֽי־מַפְרִ֨יס פַּרְסָ֜ה ה֗וּא וְשֹׁסַ֥ע שֶׁ֙סַע֙ פַּרְסָ֔ה וְה֖וּא גֵּרָ֣ה לֹֽא־יִגָּ֑ר טָמֵ֥א ה֖וּא לָכֶֽם׃(ח) מִבְּשָׂרָם֙ לֹ֣א תֹאכֵ֔לוּ וּבְנִבְלָתָ֖ם לֹ֣א תִגָּ֑עוּ טְמֵאִ֥ים הֵ֖ם לָכֶֽם׃
(1) The LORD spoke to Moses and Aaron, saying to them:(2) Speak to the Israelite people thus: These are the creatures that you may eat from among all the land animals:(3) any animal that has true hoofs, with clefts through the hoofs, and that chews the cud—such you may eat.(4) The following, however, of those that either chew the cud or have true hoofs, you shall not eat: the camel—although it chews the cud, it has no true hoofs: it is unclean for you;(5) the daman—although it chews the cud, it has no true hoofs: it is unclean for you;(6) the hare—although it chews the cud, it has no true hoofs: it is unclean for you;(7) and the swine—although it has true hoofs, with the hoofs cleft through, it does not chew the cud: it is unclean for you.(8) You shall not eat of their flesh or touch their carcasses; they are unclean for you.
How do you know which land animals are kosher?
(ט) אֶת־זֶה֙ תֹּֽאכְל֔וּ מִכֹּ֖ל אֲשֶׁ֣ר בַּמָּ֑יִם כֹּ֣ל אֲשֶׁר־לוֹ֩ סְנַפִּ֨יר וְקַשְׂקֶ֜שֶׂת בַּמַּ֗יִם בַּיַּמִּ֛ים וּבַנְּחָלִ֖ים אֹתָ֥ם תֹּאכֵֽלוּ׃(י) וְכֹל֩ אֲשֶׁ֨ר אֵֽין־ל֜וֹ סְנַפִּ֣יר וְקַשְׂקֶ֗שֶׂת בַּיַּמִּים֙ וּבַנְּחָלִ֔ים מִכֹּל֙ שֶׁ֣רֶץ הַמַּ֔יִם וּמִכֹּ֛ל נֶ֥פֶשׁ הַחַיָּ֖ה אֲשֶׁ֣ר בַּמָּ֑יִם שֶׁ֥קֶץ הֵ֖ם לָכֶֽם׃(יא) וְשֶׁ֖קֶץ יִהְי֣וּ לָכֶ֑ם מִבְּשָׂרָם֙ לֹ֣א תֹאכֵ֔לוּ וְאֶת־נִבְלָתָ֖ם תְּשַׁקֵּֽצוּ׃(יב) כֹּ֣ל אֲשֶׁ֥ר אֵֽין־ל֛וֹ סְנַפִּ֥יר וְקַשְׂקֶ֖שֶׂת בַּמָּ֑יִם שֶׁ֥קֶץ ה֖וּא לָכֶֽם׃
(9) These you may eat of all that live in water: anything in water, whether in the seas or in the streams, that has fins and scales—these you may eat.(10) But anything in the seas or in the streams that has no fins and scales, among all the swarming things of the water and among all the other living creatures that are in the water—they are an abomination for you(11) and an abomination for you they shall remain: you shall not eat of their flesh and you shall abominate their carcasses.(12) Everything in water that has no fins and scales shall be an abomination for you.
How do you know which water animals you can eat?
(יג) וְאֶת־אֵ֙לֶּה֙ תְּשַׁקְּצ֣וּ מִן־הָע֔וֹף לֹ֥א יֵאָכְל֖וּ שֶׁ֣קֶץ הֵ֑ם אֶת־הַנֶּ֙שֶׁר֙ וְאֶת־הַפֶּ֔רֶס וְאֵ֖ת הָעָזְנִיָּֽה׃(יד) וְאֶת־הַ֨דָּאָ֔ה וְאֶת־הָאַיָּ֖ה לְמִינָֽהּ׃(טו) אֵ֥ת כָּל־עֹרֵ֖ב לְמִינֽוֹ׃(טז) וְאֵת֙ בַּ֣ת הַֽיַּעֲנָ֔ה וְאֶת־הַתַּחְמָ֖ס וְאֶת־הַשָּׁ֑חַף וְאֶת־הַנֵּ֖ץ לְמִינֵֽהוּ׃(יז) וְאֶת־הַכּ֥וֹס וְאֶת־הַשָּׁלָ֖ךְ וְאֶת־הַיַּנְשֽׁוּף׃(יח) וְאֶת־הַתִּנְשֶׁ֥מֶת וְאֶת־הַקָּאָ֖ת וְאֶת־הָרָחָֽם׃(יט) וְאֵת֙ הַחֲסִידָ֔ה הָאֲנָפָ֖ה לְמִינָ֑הּ וְאֶת־הַדּוּכִיפַ֖ת וְאֶת־הָעֲטַלֵּֽף׃
(13) The following you shall abominate among the birds—they shall not be eaten, they are an abomination: the eagle, the vulture, and the black vulture;(14) the kite, falcons of every variety;(15) all varieties of raven;(16) the ostrich, the nighthawk, the sea gull; hawks of every variety;(17) the little owl, the cormorant, and the great owl;(18) the white owl, the pelican, and the bustard;(19) the stork; herons of every variety; the hoopoe, and the bat.
How do you know which birds you can eat?
(כ) כֹּ֚ל שֶׁ֣רֶץ הָע֔וֹף הַהֹלֵ֖ךְ עַל־אַרְבַּ֑ע שֶׁ֥קֶץ ה֖וּא לָכֶֽם׃ (ס)(כא) אַ֤ךְ אֶת־זֶה֙ תֹּֽאכְל֔וּ מִכֹּל֙ שֶׁ֣רֶץ הָע֔וֹף הַהֹלֵ֖ךְ עַל־אַרְבַּ֑ע אֲשֶׁר־לא [ל֤וֹ] כְרָעַ֙יִם֙ מִמַּ֣עַל לְרַגְלָ֔יו לְנַתֵּ֥ר בָּהֵ֖ן עַל־הָאָֽרֶץ׃(כב) אֶת־אֵ֤לֶּה מֵהֶם֙ תֹּאכֵ֔לוּ אֶת־הָֽאַרְבֶּ֣ה לְמִינ֔וֹ וְאֶת־הַסָּלְעָ֖ם לְמִינֵ֑הוּ וְאֶת־הַחַרְגֹּ֣ל לְמִינֵ֔הוּ וְאֶת־הֶחָגָ֖ב לְמִינֵֽהוּ׃(כג) וְכֹל֙ שֶׁ֣רֶץ הָע֔וֹף אֲשֶׁר־ל֖וֹ אַרְבַּ֣ע רַגְלָ֑יִם שֶׁ֥קֶץ ה֖וּא לָכֶֽם׃
(20) All winged swarming things that walk on fours shall be an abomination for you.(21) But these you may eat among all the winged swarming things that walk on fours: all that have, above their feet, jointed legs to leap with on the ground—(22) of these you may eat the following: locusts of every variety; all varieties of bald locust; crickets of every variety; and all varieties of grasshopper.(23) But all other winged swarming things that have four legs shall be an abomination for you.
How do you know which locusts you can eat?
(ו) סִימָנֵי בְהֵמָה וְחַיָּה נֶאֶמְרוּ מִן הַתּוֹרָה, וְסִימָנֵי הָעוֹף לֹא נֶאֱמָרוּ. אֲבָל אָמְרוּ חֲכָמִים, כָּל עוֹף הַדּוֹרֵס, טָמֵא. כֹּל שֶׁיֶּשׁ לוֹ אֶצְבַּע יְתֵרָה, וְזֶפֶק, וְקֻרְקְבָנוֹ נִקְלָף, טָהוֹר. רַבִּי אֱלִיעֶזֶר בַּר צָדוֹק אוֹמֵר, כָּל עוֹף הַחוֹלֵק אֶת רַגְלָיו, טָמֵא:
(ז) וּבַחֲגָבִים, כֹּל שֶׁיֶּשׁ לוֹ אַרְבַּע רַגְלַיִם, וְאַרְבַּע כְּנָפַיִם, וְקַרְסֻלַּיִם, וּכְנָפָיו חוֹפִין אֶת רֻבּוֹ. רַבִּי יוֹסֵי אוֹמֵר, וּשְׁמוֹ חָגָב. וּבַדָּגִים, כֹּל שֶׁיֶּשׁ לוֹ סְנַפִּיר וְקַשְׂקָשֶׂת. רַבִּי יְהוּדָה אוֹמֵר, שְׁנֵי קַשְׂקַשִּׂין וּסְנַפִּיר אֶחָד. וְאֵלּוּ הֵן קַשְׂקַשִּׂין, הַקְּבוּעִין בּוֹ. וּסְנַפִּירִין, הַפּוֹרֵחַ בָּהֶן:
(6) The characteristics of cattle and of wild animals are stated in the Torah. The characteristics of birds are not stated, but the sages said: every bird that seizes its prey is unclean. Every bird that has an extra toe, or a crop and a gizzard that can be peeled, is clean. Rabbi Elazar bar Zadok says: every bird that parts its toes is unclean.
(7) Of locusts: all that have four legs, four wings, leaping legs, and wings covering the greater part of the body, [are clean.] Rabbi Yose says: its name must be locust. Of fishes: all that have fins and scales [are clean]. Rabbi Judah says: there must be [at least] two scales and one fin. The scales are those which are immovable, the fins are those [wings] by which it swims.
(כא) לֹ֣א תֹאכְל֣וּ כָל־נְ֠בֵלָה לַגֵּ֨ר אֲשֶׁר־בִּשְׁעָרֶ֜יךָ תִּתְּנֶ֣נָּה וַאֲכָלָ֗הּ א֤וֹ מָכֹר֙ לְנָכְרִ֔י כִּ֣י עַ֤ם קָדוֹשׁ֙ אַתָּ֔ה לַיהוה אֱלֹהֶ֑יךָ לֹֽא־תְבַשֵּׁ֥ל גְּדִ֖י בַּחֲלֵ֥ב אִמּֽוֹ׃ (פ)
(21) You shall not eat anything that has died a natural death; give it to the stranger in your community to eat, or you may sell it to a foreigner. For you are a people consecrated to the LORD your God. You shall not boil a kid in its mother’s milk.
So, what aren’t you supposed to do to a baby goat?
How can you be safe if you don’t know which animal the milk came from?
(א) כָּל הַבָּשָׂר אָסוּר לְבַשֵּׁל בְּחָלָב, חוּץ מִבְּשַׂר דָּגִים וַחֲגָבִים. וְאָסוּר לְהַעֲלוֹתוֹ עִם הַגְּבִינָה עַל הַשֻּׁלְחָן, חוּץ מִבְּשַׂר דָּגִים וַחֲגָבִים. הַנּוֹדֵר מִן הַבָּשָׂר, מֻתָּר בִּבְשַׂר דָּגִים וַחֲגָבִים. הָעוֹף עוֹלֶה עִם הַגְּבִינָה עַל הַשֻּׁלְחָן וְאֵינוֹ נֶאֱכָל, דִּבְרֵי בֵית שַׁמַּאי. וּבֵית הִלֵּל אוֹמְרִים, לֹא עוֹלֶה וְלֹא נֶאֱכָל. אָמַר רַבִּי יוֹסֵי, זוֹ מִקֻּלֵּי בֵית שַׁמַּאי וּמֵחֻמְרֵי בֵית הִלֵּל. בְּאֵיזֶה שֻׁלְחָן אָמְרוּ, בַּשֻּׁלְחָן שֶׁאוֹכֵל עָלָיו. אֲבָל בַּשֻּׁלְחָן שֶׁסּוֹדֵר עָלָיו אֶת הַתַּבְשִׁיל, נוֹתֵן זֶה בְצַד זֶה וְאֵינוֹ חוֹשֵׁשׁ:
(1) Every kind of flesh is forbidden to be cooked in milk, except for the flesh of fish and of locusts. And it is also forbidden to place it upon the table with cheese, except for the flesh of fish and of locusts. One who vows not to eat meat, he is allowed to eat the flesh of fish and locusts. Fowl may be placed upon the table together with cheese but may not be eaten with it, the words of Bet Shammai. Bet Hillel say: it may neither be placed [upon the table together with cheese] nor eaten with it. Rabbi Yose said: this is one of the leniencies of Bet shammai and the stringencies of Bet Hillel . Concerning what table did they speak? Concerning the table upon which one eats; but on the table whereon the food is set out one may place the one beside the other, and not be concerned.