Intentional Work [Melechet Machashevet] on Shabbat, and Violation of the law as an inevitable byproduct of an act [Psik Reisheih]

One who never knew Shabbat existed

Regarding Shabbat, one is liable only for melechet machashevet: Zevachim 47a

The principle of requiring intentional melachah for full violation of Shabbat is like a mountain dangling by a hair: Chagigah 10a, 10b

Source for treating such transgressions differently for Shabbat than for general prohibitions: Pesachim 33a

Where the prohibited result is guaranteed to happen: Shabbat 103a, 111b, 133a, 143a; Menachot 41b

Violation of a prohibition which warrants Divine ex-communication, while attempting to fulfill a Mitzvah: Succah 41b, 42a

Regarding meilah - illegal use of sanctified items: Pesachim 33a

Regarding removing hair from a nazirite: Shabbat 81b

Regarding benefit from issurei hanaah [items from which benefit is prohibited] against one's intent: Pesachim 25b-26a

Regarding cutting off a mark of tzaraat: Shabbat 133a

Regarding circumcision which cuts off a mark of tzaraat: Shabbat 133a

Regarding initial sexual relations on Shabbat: Ketuvot 5b-7a

Regarding watering the floor on Shabbat: Shabbat 95a

Regarding using a sponge on Shabbat: Shabbat 143a

Regarding placing a rag in a barrel as a stopper on Shabbat: Shabbat 111a-b, Ketuvot 6a

Regarding Dragging an item, creating a groove, on Shabbat: Pesachim 101a

Regarding wiping one's self with rocks on Shabbat, potentially separating threads from the rectum: Shabbat 81b

Regarding pruning on Shabbat, which incidentally improves the ground: Shabbat 103a

Regarding trying to extinguish a flame, where it actually ignites: Keritot 20a-b

Where one forgot his initial intent before he performed the act: Keritot 19b-20a

Regarding general prohibitions: Shabbat 72b-73a; Pesachim 33a; Keritot 19a-b, 19b-20b

Regarding Shabbat: Shabbat 72b-73a, 75a, 92b, 107a; Keritot 19a-b, 19b-20b

Regarding meilah [illegal use of sanctified items]: Pesachim 33a

Regarding eating prohibited foods: Keritot 19a-b, 19b-20b

Regarding slaughter of a korban: Zevachim 47a

Intending to perform a given act upon an item with which that act is permitted, and accidentally doing that act upon an item with which that act is prohibited: Shabbat 72b; Keritot 19a-b

Intending to perform a given act upon an item with which that act is permitted, and accidentally doing a different act upon an item with which that different act is prohibited: Shabbat 72b; Keritot 19a-b

Intending to eat one prohibited item and instead eating an item that is prohibited for a different reason, but remaining liable because he did benefit: Keritot 19a-b, 19b-20b

Killing a dangerous snake/scorpion by stepping on it in one's ordinary path of walking: Shabbat 121b

Regarding measuring on Shabbat: Shabbat 157b

The rule where one intended to pick one kind of fruit and picked another, or fruit of one color and picked fruit of another color, on Shabbat: Keritot 19a, 19b-20a

Circumcising a child on Shabbat, before his eighth day: Keritot 19b

Lighting or extinguishing the flame one did not intend to light/extinguish, instead of the one which one did intend to light/extinguish: Keritot 20a

Lighting one flame and extinguishing another in a single breath - but in the reverse of the order in which one had intended to do it: Keritot 20a-b

The law where the prohibited event is guaranteed to happen [psik reisheih]: Shabbat 75a

The law where the prohibited event is guaranteed to happen, but one is adversely affected by the prohibited side-effect [psik reisheih d'lo nicha leih]: Shabbat 75a

Establishing a case to be one of an inevitable byproduct, despite the evidence of the majority of cases: Ketuvot 6b (See Rashi)

Where the action was unintentional, but the result of it was inevitable: Shabbat 75a, 103a, 111b, 117a, 120b, 133a, 143b; Succah 33b



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