And Hajjaj ibn al-Sha'ir narrated to me, saying: 'Abd al-Samad ibn 'Abd al-Warith narrated to us, saying: my father narrated to us, saying: Husayn narrated to us, from Qatadah, from 'Abdullah ibn Ma'bad al-Zimmani, from 'Abdullah ibn 'Utbah, from 'Abdullah ibn Mas'ud, regarding [the verse]: "Those whom they call upon seek means of access to their Lord" — he said: It was revealed concerning a group of Arabs who used to worship a group of the jinn. The jinn became Muslim, while the humans who used to worship them were unaware. So the verse was revealed: "Those whom they call upon seek means of access to their Lord."