Sahih Muslim | Book 26 | Hadith Number 5457

Narrated by 'Auf b. Malik Ashja'i
'Auf b. Malik Ashja'i reported We practised incantation in the pre-Islamic days and we said: Allah's Messenger, what is your opinion about it? He said: Let me know your incantation and said: There is no harm in the incantation which does not smack of polytheism.