Sahih Muslim Book - 54, Hadith - 7557

وَحَدَّثَنِى حَجَّاجُ بْنُ الشَّاعِرِ حَدَّثَنَا عَبْدُ الصَّمَدِ بْنُ عَبْدِ الْوَارِثِ حَدَّثَنِى أَبِى حَدَّثَنَا حُسَيْنٌ عَنْ قَتَادَةَ عَنْ عَبْدِ اللَّهِ بْنِ مَعْبَدٍ الزِّمَّانِىِّ عَنْ عَبْدِ اللَّهِ بْنِ عُتْبَةَ عَنْ عَبْدِ اللَّهِ بْنِ مَسْعُودٍ ( أُولَئِكَ الَّذِينَ يَدْعُونَ يَبْتَغُونَ إِلَى رَبِّهِمُ الْوَسِيلَةَ) قَالَ نَزَلَتْ فِى نَفَرٍ مِنَ الْعَرَبِ كَانُوا يَعْبُدُونَ نَفَرًا مِنَ الْجِنِّ فَأَسْلَمَ الْجِنِّيُّونَ وَالإِنْسُ الَّذِينَ كَانُوا يَعْبُدُونَهُمْ لاَ يَشْعُرُونَ فَنَزَلَتْ (أُولَئِكَ الَّذِينَ يَدْعُونَ يَبْتَغُونَ إِلَى رَبِّهِمُ الْوَسِيلَةَ)

It was narrated from 'Abdullah bin Mas'ud, may Allah be pleased with him, (concerning the Verse): "Those whom they call upon desire (for themselves) means of access to their Lord..." He said: "This was revealed concerning a group of Arabs who used to worship a group of jinn. The jinn became Muslims, but the humans who used to worship them were unaware of that. Then the words "Those whom they call upon desire (for themselves) means of access to their Lord..." were revealed."