Musnad Abu Ya'la al-Mawsili 110:247

Zuhayr narrated to us, Hajjaj ibn Muhammad narrated to us, from Ibn Jurayj, who said: I heard ‘Ata’ saying: I heard Ibn ‘Abbas saying: I heard the Prophet of Allah (may Allah bless him and grant him peace) saying: "If the son of Adam had a valley full of wealth, he would love to have another one like it, and nothing fills the belly of the son of Adam except dust, and Allah turns in forgiveness to whoever repents." Ibn ‘Abbas said: I do not know if it is from the Qur’an or not.