It is forbidden to play musical instruments...

It is forbidden to play musical instruments, such as tambourine, flute, guitar, lute, violin, and piano, and to listen to the playing of these instruments when the quality of the music is suitable for gatherings of frivolity, dance, or revelry. It is forbidden to forge lies against God, the Holy Prophet, and the Holy Infallibles without a religiously acceptable reason, whether during Ramadhan or in any other season.

The difference between this type of lie and others is that the intellectual offensiveness and religious prohibition of the former is considered far graver than the latter. Such forgeries invalidate the fasting when they are told during a fast-day of Ramadhan.

Any action that is preparatory to the commitment of a sin is forbidden, even if the action is allowed in itself, like studying the basics of spying for foreigners, learning how to gamble, how to produce narcotics, and methods of fraud, and arranging for the preliminaries of murdering or hurting people. It is forbidden for men to shave their beard or to cut it in a way that the skin of the face shows. However, this issue is controversial.

It is forbidden to enthrall believing jinn, angels, and spirits of dead believers in a way that causes them distress or pain. It is forbidden to make up a fake dream and narrate it to others. This is a kind of lie but it has been mentioned separately because it is frequent. It is forbidden to commit suicide, which entails the same laws of homicide, except in cases of emergency.

It is forbidden to settle or reside in places or countries that entail alteration of one’s Islamic beliefs and humane morality or incompliance with Islamic obligations and restrictions.

It is forbidden to gamble and bet in any way and with any device, whether local or imported equipments and cards or modern or traditional devices, even with eggs, a ring, by making two animals fight, jumping the highest, weightlifting, and the like betting competitions, except for the lawful competitions, such as horseracing, races with other means of transport, shooting competitions, and similar competitions, which can be used in initiative or defensive war.

It is also forbidden to play with gambling tools even without betting. However, this latter issue is controversial. Consequently, it is obligatory to destroy or modify the tools of gambling as well as musical instruments. In general, one must destroy any tool that is used for unlawful purposes and does not possess a significant permissible usage.