" Those to whom they call upon, themselves seek the means or access to their Lord as to whoever of them becomes nearest" (xvii. 57) that it related to a party of Jinn who were being worshipped and they embraced Islam but those who worshipped them kept on worshipping them (though the Jinn whom the misguided people worshipped had become Muslims). It was then that this verse was revealed.
عَنْ عَبْدِ اللَّهِ فِي قَوْلِهِ ﷻ { أُولَئِكَ الَّذِينَ يَدْعُونَ يَبْتَغُونَ إِلَى رَبِّهِمُ الْوَسِيلَةَ أَيُّهُمْ أَقْرَبُ} قَالَ كَانَ نَفَرٌ مِنَ الْجِنِّ أَسْلَمُوا وَكَانُوا يُعْبَدُونَ فَبَقِيَ الَّذِينَ كَانُوا يَعْبُدُونَ عَلَى عِبَادَتِهِمْ وَقَدْ أَسْلَمَ النَّفَرُ مِنَ الْجِنِّ