Musnad Abu Ya'la al-Mawsili 155:370

Abu Bakr ibn Abi Shaybah narrated to us, Ibn Abi Ubaydah narrated to us, my father narrated to us, al-A'mash narrated to us, from Abu Hazim, from Abu Hurayrah, that the Prophet (peace and blessings of Allah be upon him) forbade the price of a dog and the dowry of a prostitute.