Hadith 517
Sayyiduna Ibn Umar (may Allah be pleased with them) says: The Messenger of Allah (peace and blessings be upon him) made an agreement with the people of Khaybar for half of whatever was produced from the land, whether crops or dates. The Prophet (peace and blessings be upon him) used to give his wives one hundred wasq annually—eighty wasq of dates and twenty wasq of barley.