Musnad Abu Ya'la al-Mawsili 153:3

Abu Khaythama narrated to us, Ibn 'Uyaynah narrated to us, al-Zuhri narrated to us, from Salim, from his father, from the Prophet (peace be upon him) who 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 hours of the day; and a man whom Allah has given wealth, so he spends it during the hours of the night and the hours of the day."