Musannaf Ibn Abi Shayba 22:103

Ghundar narrated to us, from Shu'bah, from Ziyad ibn Mikhraq, from Abu Iyas, from Abu Kinanah, from Abu Musa, that he said: "Indeed, this Qur'an will be a reminder for you and will be a reward for you, or it will be a burden upon you. So follow the Qur'an, and do not let the Qur'an follow you. For whoever follows the Qur'an, it will descend with him upon the gardens of Paradise. And whoever the Qur'an follows, it will strike him on the back of his neck and cast him into Hell."