Musnad Abu Ya'la al-Mawsili 155:247

Abu Bakr ibn Abi Shaybah narrated to us, Ibn Fudayl narrated to us, from 'Amarah ibn al-Qa'qa', from Abu Zur'ah, from Abu Hurayrah, who said: The Messenger of Allah (may Allah bless him and grant him peace) said: "Whoever asks people for their wealth to increase [his own], he is only asking for a burning coal, so let him ask for little or let him ask for much."