Sayyiduna Abdullah bin Abbas (may Allah be pleased with them both) said about this verse: "And when We directed to you a group of the jinn, listening to the Qur'an; and when they attended it" [Surah al-Ahqaf: 29], to the end of the verse: "They were nine individuals from the people of Nasibin." So the Messenger of Allah (peace and blessings be upon him) sent them as messengers to their people.
Hadith Referenceالمعجم الكبير للطبراني / باب العين / 11610