Musnad Ahmad 33:361

Abu Abd al-Rahman Abdullah ibn Yazid narrated to us, from his memory, Sa'id ibn Abi Ayyub narrated to us, Amr ibn Jabir Abu Zur'ah al-Hadrami narrated to me, he said: I heard Jabir ibn Abdullah saying: The Messenger of Allah, may Allah bless him and grant him peace, said: "The poor of the Muslims will enter Paradise before the rich by forty autumns."