Musnad Ahmad 33:537

Ishaq ibn Isa narrated to us, Ibn Lahi'ah narrated to us, from Abu al-Zubayr, from Jabir, and from Khayr ibn Nu'aym, from Ata, from Jabir, that the Prophet, peace and blessings of Allah be upon him, forbade the price of a dog, and forbade the price of a cat.