Musnad Ahmad 172:3

Muhammad ibn Ja'far narrated to us, Shu'bah narrated to us, from Muhammad ibn Ishaq, from Muhammad ibn Ibrahim, from Sa'id ibn al-Musayyib, from Ma'mar, a man from Quraysh, who said: The Messenger of Allah, peace and blessings of Allah be upon him, said: "No one hoards except a sinner."