Musnad Ahmad 35:11

Yazid narrated to us, Ibn Abi Dhi'b informed us, from Muslim ibn Jundub, from Hakim ibn Hizam, who said: I asked the Messenger of Allah (peace and blessings of Allah be upon him) for wealth, and I persisted. He said: "O Hakim, I do not deny your asking. O Hakim, this wealth is green and sweet, and it is, along with that, the filth of people's hands. The hand of Allah is above the hand of the giver, and the hand of the giver is above the hand of the receiver, and the lowest of the hands is the hand of the receiver."