It is narrated from Sayyiduna Abdullah bin Mas’ud (may Allah be pleased with them both) regarding this verse:“Those whom they call upon, they themselves seek means of access to their Lord,”that some people used to worship certain jinn. Those jinn became Muslims (and their worshippers did not know about it). And those people continued to worship them, then this verse was revealed:“Those whom they worship, they themselves seek means of access to their Lord.”