Musnad Ahmad 30:2842

Waki’ narrated to us, from Sufyan, from Abu al-Zinad, from al-A’raj, from Abu Hurayrah, who said: The Messenger of Allah (peace and blessings of Allah be upon him) said: "We, the company of prophets, are not inherited from. Whatever I leave behind, after the provision of my worker and the maintenance of my wives, is charity."