Musannaf Ibn Abi Shayba 13:1022

Abu Bakr narrated to us, he said: Ibn 'Uyaynah narrated to us, from al-Zuhri, from Haram ibn Sa'd ibn Muhayyisah, that his father asked the Prophet, peace and blessings of Allah be upon him, about the earnings of a cupper. He forbade him from it, but he did not cease speaking to him until he said: "Feed it to your water-carrying camel, or feed it to your servants."