Shaitan is the source of all evil

Everything that happens among the sons of Adam of kufr (disbelief of the Truth), murder, enmity, hatred, the spread of immorality and fornication, the public wanton display of women’s beauty, drinking alcohol, worshipping idols and other major sins, is all the work of Satan to corrupt mankind and to drive people from following the way of Allah and drag them to the Fire of Hell with him. So, let’s remember that when we find ourselves around evil or being lured by it, Satan is engaged in his work and our task is to fend off his plans.

Allah says in the Quran:

“And if an evil whisper from Shaitan (Satan) tries to turn you away (O Muhammad) (from doing good), then seek refuge in Allah. Verily, He is the All Hearer, the All Knower”
                                         (Quran, Fussilat: 36).