Abu Dawud Book 21, Hadith Number 3797.
Chapter : Not known.
Narated By Khalid ibn al-Walid : I went with the Apostle of Allah (PBUH) to fight at the battle of Khaybar, and the Jews came and complained that the people had hastened to take their protected property (as a booty), so the Apostle of Allah (PBUH) said: The property of those who have been given a mules, every fanged beast of prey, and every bird with a talon are forbidden for you.