O ye who believe (Muslim)! Avoid suspicion as much (as possible): for suspicion in some cases is a sin: And spy not on each other behind their backs. Would any of you like to eat the flesh of his dead brother? Nay, ye would abhor it...But fear Allah: For Allah is Oft-Returning, Most Merciful.(Surah 49:12)

http://www.youtube.com/watch?v=v_5P5xwAPw8