Musnad Ahmad 30:936

Bahz narrated to us, Hammad ibn Salamah narrated to us, Ishaq ibn Abdullah informed us, from Abu Salih, from Abu Hurairah, that the Messenger of Allah (peace and blessings of Allah be upon him) said: "A man carried wine with him on a ship to sell it, and he had a monkey with him." He said: "Whenever the man would sell the wine, he would mix it with water, then sell it." He said: "The monkey took the purse and climbed with it to the top of the mast." He said: "It began throwing a dinar into the sea and a dinar into the ship, until it had divided it."