Musnad Abu Ya'la al-Mawsili 109:224

Abu Khaythama narrated to us, Yazid narrated to us, al-Hajjaj ibn Artah informed us, from Abu al-Zubayr, from Jabir, who said: The Messenger of Allah (peace and blessings of Allah be upon him) said regarding animals: "Two for one is fine, but it is not permissible on credit."