Kashrut
Among the numerous laws that form "kashrut" are prohibitions on the consumption of certain animals (such as pork and shellfish), mixtures of meat and milk, and the commandment to slaughter mammals and birds according to a process known as "shechita". There are also laws regarding agricultural produce that might impact the suitability of food for consumption.
Nineveh
Nineveh's repentance and salvation from evil can be found in the Jewish Tanakh (also read by Christians) and the Muslim Koran. To this day, Syriac and Oriental Orthodox churches commemorate the three days Jonah spent inside the fish during the Fast of Nineveh. The Christians observing this holiday fast by refraining from food and drink. Churches encourage followers to refrain from meat, fish and dairy products.