Musnad Ahmad 30:1144

Abu Abd al-Rahman narrated to us, Musa—meaning Ibn Ali—narrated to us, he said: I heard my father narrating from Abd al-Aziz ibn Marwan ibn al-Hakam, he said: I heard Abu Hurairah saying: The Messenger of Allah, peace and blessings of Allah be upon him, said: "The worst thing in a man is anxious greed and cowardly fear."