Hadith Qudsi 19:5: "The Prophet said that Allah commanded him to destroy all the musical instruments, idols, crosses and all the trappings of ignorance." (The Hadith Qudsi, or holy Hadith, are those in which Muhammad transmits the words of Allah, although those words are not in the Qur'an.)
Muhammad also said:
(1) "Allah Mighty and Majestic sent me as a guidance and mercy to believers and commanded me to do away with musical instruments, flutes, strings, crucifixes, and the affair of the pre-Islamic period of ignorance."
(2) "On the Day of Resurrection, Allah will pour molten lead into the ears of whoever sits listening to a songstress."
(3) "Song makes hypocrisy grow in the heart as water does herbage."
(4) "This community will experience the swallowing up of some people by the earth, metamorphosis of some into animals, and being rained upon with stones." Someone asked, "When will this be, O Messenger of Allah?" and he said, "When songstresses and musical instruments appear and wine is held to be lawful."
(5) "There will be peoples of my Community who will hold fornication, silk, wine, and musical instruments to be lawful ...." -- 'Umdat al-Salik r40.0
"Stop uploading songs on mobile phones, warns Taliban pamphlet," by Abuzar Afridi for the Express Tribune, August 13 (thanks to Lachlan):
LANDI KOTAL: Tehreek-e-Taliban (TTP) issued a pamphlet to owners of mobile phone shops in the Landi Kotal area of Khyber Agency, warning them to stop uploading songs, movies and pictures to mobile phones.
The pamphlet stated that those associated with mobile phone business should wind up and start another business as they are committing “un-Islamic acts” by uploading songs and movies to mobile phones.
Political administration official for the area Amjid Shinwari confirmed that the pamphlet was issued by unidentified TTP militants on August 12 and added that these pamphlets were distributed and pasted on the shutters of various mobile phone shops.
The shop and market owners are also threatened of dire consequences if the instructions are not followed.
“The owner of this market along with the businessmen would be targeted,” the pamphlet stated.