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Yoreh De'ah — Issur ve-Heter

The kashrus of food: bassar be-chalav, taarovos, hag'alas keilim. Study in 4 levels, with the nossei keilim of Yoreh De'ah — Shach (ש״ך), Taz (ט״ז), Pri Megadim, Pithei Teshuva.

After Hilchos Shabbat (Orach Chaim), the platform opens the Yoreh De'ah section — the heart of kashrus. Unlike Orach Chaim, Yoreh De'ah has no Mishna Berura: its principal commentaries are the Shach, the Taz, the Pri Megadim and the Pithei Teshuva.

Issur ve-Heter — available simanim

96 simanim available · updated 2026-09-11

פ״ז· 87Basar be-halav — the prohibition of meat פ״ח· 88Not serving meat on a table where cheese פ״ט· 89Not eating cheese after meat צ׳· 90The kachal (the udder) צ״א· 91Meat and milk that became mixed צ״ב· 92Milk that Fell into a Meat Pot צ״ג· 93Cooking Milk in a Meat Pot צ״ד· 94Dipping a Dairy Spoon into a Meat Pot צ״ה· 95Fish and Eggs Cooked in a Meat Pot צ״ו· 96A Sharp Food Cut with a Knife (Davar Charif) צ״ז· 97Not Kneading Dough with Milk צ״ח· 98A Prohibition Mixed into Permitted Food צ״ט· 99One May Not Nullify a Prohibition Deliberately ק׳· 100A Beriah (Whole Creature) Is Never Nullified ק״א· 101A Piece Fit to Be Served (חתיכה הראויה להתכבד) ק״ב· 102Something That Has a Way to Become Permitted ק״ג· 103A Taste That Spoils (Notein Taam Lifgam) ק״ד· 104A Mouse Found in Wine or Beer (Akhbar) ק״ה· 105How Forbidden Food Transmits Its Taste ק״ו· 106How One Nullifies in Sixty ק״ז· 107Cooking Eggs and the Order of Removal ק״ח· 108Does Smell Transfer Prohibition? (Reicha) ק״ט· 109Dry-in-Dry (Yavesh be-Yavesh) ק״י· 110What Does Not Nullify (Davar Chashuv) קי״א· 111Attribution (Tolin / Shani Omer) קי״ב· 112Bread of Non-Jews (פת עכו״ם) קי״ג· 113Food Cooked by Non-Jews (בישולי עכו״ם) קי״ד· 114Beer & Beverages of Non-Jews (שכר עכו״ם) קט״ו· 115Milk, Cheese & Butter of Non-Jews קט״ז· 116Prohibitions Due to Danger (סכנה) קי״ז· 117Trading in Forbidden Food (סחורה) קי״ח· 118Food Entrusted via a Non-Jew (חותמות) קי״ט· 119The ḥashud — the trustworthiness of one suspected of a prohibition ק״כ· 120Tevilat kelim — immersing vessels acquired from a non-Jew קכ״א· 121Kashering vessels bought from a non-Jew קכ״ב· 122Notén taam lifgam — a taste that spoils, in vessels קכ״ג· 123Stam yeinam and yayin nesekh — which wine is forbidden, and why קכ״ד· 124Who renders wine forbidden — a non-Jew's contact with the barrel קכ״ה· 125Wine moved by a non-Jew's force — koaḥ and koaḥ koḥo קכ״ו· 126Mixture with yayin nesekh — and nitzok, the connecting stream קכ״ז· 127Is one believed to forbid another's wine? קכ״ח· 128A non-Jew left alone with the wine — yiḥud קכ״ט· 129Wine left in a non-Jew's hands, and the Jew who comes and goes ק״ל· 130Sealing the wine — one seal, two seals קל״א· 131Kosher wine made on a non-Jew's premises קל״ב· 132Deriving no benefit from yayin nesekh קל״ג· 133Wages earned from yayin nesekh קל״ד· 134Libated wine that has become mixed קל״ה· 135In which vessels there is concern of libation קל״ו· 136The empty cask entrusted to a non-Jew קל״ז· 137Kosher wine put into a vessel that was not kashered קל״ח· 138Kashering the wine vessels קל״ט· 139Idols, their nullification, their appurtenances and their vessels ק״מ· 140The idolatrous object lost in the mixture קמ״א· 141The statues and figures of idolatry קמ״ב· 142Idols and their appurtenances are forbidden for benefit קמ״ג· 143Not to build one’s house next to a house of idolatry, and when one may benefit from idolatry קמ״ד· 144The price of the idol קמ״ה· 145Idols one may benefit from קמ״ו· 146Which idol can be nullified and which cannot קמ״ז· 147Not to swear by the name of idols, and the laws of mentioning their name קמ״ח· 148The laws of the festivals of the idols קמ״ט· 149The fair of the non-Jews ק״נ· 150To keep away from the road of idols, and not to bend before it קנ״א· 151What a Jew does not sell to idolatrous worship, and what he owes it nonetheless קנ״ב· 152The non-Jew’s wedding feast קנ״ג· 153Seclusion with a non-Jew קנ״ד· 154The midwife and the wet-nurse קנ״ה· 155Being healed by a non-Jew קנ״ו· 156Having one’s hair cut by a non-Jew קנ״ז· 157For which transgressions one is killed rather than transgress קנ״ח· 158Those who serve idolatry, and saving them from death קנ״ט· 159Lending at interest to a non-Jew and to an apostate ק״ס· 160The severity of the prohibition of interest, and how far one must guard against it קס״א· 161Dust of interest, and what is called Torah interest קס״ב· 162Lending a se’ah for a se’ah קס״ג· 163Converting a debt into wheat at today’s rate קס״ד· 164The pledged field and the lease returned to the debtor קס״ה· 165Lending on the coin, and the weight that changes קס״ו· 166The lender, his debtor’s slave, and his debtor’s courtyard קס״ז· 167Lending on condition that the money be traded with קס״ח· 168Interest that passes through the hands of a non-Jew קס״ט· 169a bridge page to siman 168 ק״ע· 170the Jew who stands surety, and the interest that passes through him קע״א· 171The non-Jew who lent at interest, and converted קע״ב· 172the lender who eats the fruits of the pledge קע״ג· 173Selling dearer for the wait, buying cheaper for paying ahead קע״ד· 174The sale on condition of return קע״ה· 175Fixing a price at the market rate קע״ו· 176Which hiring is permitted and which forbidden קע״ז· 177“Iron flock,” the עסקא and the dealings forbidden as interest קע״ח· 178Not following the customs of the nations קע״ט· 179Sorcery, auguries and divination ק״פ· 180Tattooing, and the baldness and gashing made for a dead person קפ״א· 181Shaving the פאות of the head and of the beard קפ״ב· 182A man shall not wear a woman’s garment