Musnad Ahmad 459:13

Abu Asim narrated to us, Wahb bin Khalid al-Homsi narrated to us, Umm Habibah bint al-Irbad narrated to me, she said: My father narrated to me: "That the Messenger of Allah (peace and blessings of Allah be upon him) prohibited on the day of Khaybar every bird with a talon, the meat of domesticated donkeys, the *khalisah* (meat snatched from prey), the *mujaththamah* (an animal tied up and used as a target for shooting), and that captive women be had intercourse with until they deliver what is in their wombs."