Musnad Abu Ya'la al-Mawsili 42:243

Abu Ya'la Ahmad ibn Ali ibn al-Muthanna al-Mawsili informed us, Abu Khaythama narrated to us, Abd al-Samad narrated to us, my father narrated to us, Dawud narrated to us, from Abu Nadra, from Abu Sa'id and Jabir ibn Abdullah, they both said: The Messenger of Allah (peace be upon him) said: "There will be in the end of time a Caliph who will distribute wealth and will not count it."