Three things that Muslims are forbidden to do under Islamic law and traditions include polytheism, homicide and adultery. Other forbidden acts include the breaking of pledges, perjury and the squandering of money. These are among many acts that are considered "haram," or forbidden under the religion of Islam.
The Muslim diet is also restricted with a particular emphasis on how pork-based products and meat taken from swine is considered haram. Meat from other animals, such as cows or chickens, must also be prepared a certain way and concentrated to Allah to be considered "halal." Foods that are approved in the Islamic religion include honey, fish, non-intoxicant plants and grain-based products, such as rice or wheat.