Syedna Irbad bin Sariyah (may Allah be pleased with him) narrates that on the day of Khaybar, the Noble Prophet (peace and blessings be upon him) declared as forbidden every bird that hunts with its talons, the meat of domestic donkeys, any animal killed by a beast of prey, any animal killed by being tied up and used for target practice, and intercourse with pregnant slave women until they give birth. The Prophet (peace and blessings be upon him) declared all these things to be unlawful.