Musnad Ahmad 30:858

Muhammad narrated to us, Shu'bah narrated to us, from al-Mughirah, he said: I heard 'Ubayd Allah ibn Abi Nu'm narrating. 'Abd Allah ibn Ahmad said: My father said: "It is only 'Abd al-Rahman ibn Abi Nu'm, but Ghundar said it like that." He said: That he heard Abu Hurayrah say: "The Messenger of Allah (peace and blessings of Allah be upon him) forbade the earnings of the cupper, the earnings of the prostitute, and the price of a dog." He said: "And the stud fee of the stallion." He said: And Abu Hurayrah said: "These are from my own pouch."