Musnad Ahmad 172:1

Yazid narrated to us, he said: Muhammad ibn Ishaq narrated to us, from Muhammad ibn Ibrahim al-Taymi, from Sa'id ibn al-Musayyib, from Ma'mar ibn Abdullah ibn Nadlah al-Qurashi, he said: I heard the Messenger of Allah, may Allah bless him and grant him peace, saying: "No one hoards except a sinner."