Musnad Ahmad 27:103

Sufyan narrated to us, from al-Zuhri, from Salim, from his father, who said: The Messenger of Allah (peace and blessings of Allah be upon him) said: "There is no envy except in two: A man whom Allah has given the Qur'an, so he stands with it during the hours of the night and the day; and a man whom Allah has given wealth, so he spends it in the truth during the hours of the night and the day."