Musnad Ahmad 33:452

'Abd al-Samad narrated to us, my father narrated to us, Dawud narrated to us, from Abu Nadrah, from Abu Sa'id and Jabir ibn 'Abd Allah, they both said: The Messenger of Allah, may Allah bless him and grant him peace, said: "There will be in the end of time a Caliph who will distribute wealth, and he will not count it."