Volume 3, Book 39, Number 521:
Narrated ‘Abdullah bin ‘Umar:
The Prophet concluded a contract with the people of Khaibar to utilize the land on the condition
that half the products of fruits or vegetation would be their share. The Prophet used to give his wives
one hundred Wasqs each, eighty Wasqs of dates and twenty Wasqs of barley. (When ‘Umar became
the Caliph) he gave the wives of the Prophet the option of either having the land and water as their
shares, or carrying on the previous practice. Some of them chose the land and some chose the Wasqs,
and ‘Aisha chose the land.