Musnad Ahmad 110:7

Waki’ narrated to us, from al-Dustu’i, from Yahya ibn Abi Kathir, from Abu Rashid, from ‘Abd al-Rahman ibn Shibl, who said: The Messenger of Allah (peace and blessings of Allah be upon him) said: "Recite the Qur’an, and do not consume [wealth] by means of it, and do not seek abundance through it, and do not turn away from it, and do not exceed the limits regarding it."