(22) باب لاَ بَأْسَ بِالرُّقَى مَا لَمْ يَكُنْ فِيهِ شِرْكٌ
'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.
Reference: Sahih Muslim 2200
In-book reference: Book 39, Hadith 86
USC-MSA web (English) reference(deprecated numbering scheme): Book 26, Hadith 5457