The limitations:
1. The subject matter of songs should not be against the teachings of Islam. For example, if the song is in praise of wine, and it invites people to drink, singing or listening to it is haram.
2. Although the subject matter itself may not be against the Islamic teachings, the manner of singing may render it haram; this would be the case, for example, if the singing were accompanied by suggestive sexual movement.
3. Islam fights against excess and extravagance in anything, even in worship; how, then, can it tolerate excessive involvement with entertainment? Too much time should not be wasted in such activities; after all, what is time but life itself? One cannot dispute the fact that spending time in permissible activities consumes time which ought to be resaved for carrying out religious obligations and doing good deeds. It is aptly said, "There is no excess except at the expense of a neglected duty."
4. Each individual is the best judge of himself. If a certain type of singing arouses one's passions, leads him towards sin, excites the animal instincts, and dulls spirituality, he must avoid it, thus closing the door to temptations.
5. There is unanimous agreement that if singing is done in conjunction with haram activities—for example, at a drinking party, or if it is mixed with obscenity and sin—it is haram. The Prophet (peace be on him) warned of a severe punishment for people who sing or listen to singing in such a situation when he said, Some people of my ummah will drink wine, calling it by another name, while they listen to singers accompanied by musical instruments. Allah will cause the earth to swallow them and will turn some of them into monkeys and swine. (Reported by Ibn Majah.) This does not mean that they will be physically transformed into the bodies and outward form of monkeys and swine but rather in heart and soul, carrying the heart of a monkey and the soul of a pig in their human bodies.