Musnad Abu Ya'la al-Mawsili 109:115

Muhammad ibn ‘Abbad al-Makki narrated to us, Ibn ‘Uyaynah narrated to us, from Abu al-Zubayr, from Jabir: That the Prophet, peace and blessings of Allah be upon him, was asked about the earnings of a cupper. He said—I think he said—: "Feed it to your water-carrying camel."