Abu Dawud

Narrated Ibn Umar: The Messenger of Allah ﷺ made an agreement with the people of Khaibar to work and cultivate in return for half of the fruits or produce.

Narrated Ibn Umar: The Prophet ﷺ handed over the Jews of Khaibar the palm trees and the land of Khaibar on condition that they should employ what belonged to them in working on them, and that he should have half of the fruits.

Narrated Ibn Abbas: The Messenger of Allah ﷺ conquered Khaibar, and stipulated that all the land, gold and silver would belong to him. The people of Khaibar said: we know the land more than you ; so give it to us on condition that you should have half of the produce and we would have the half. He then gave it to them on that condition. When the time of picking the fruits of the palm-trees came, he sent Abdullah bin Rawahah to them, and he assessed the among of the fruits of the palm-trees. This is what the people of Madina call khars (assessment). He used to say: In these palm-trees there is such-and-such amount (of produce). They would say: You assessed more to us, Ibn Rawahah (than the real amount). He would say: I first take the responsibility of assessing the fruits of the palm-trees and give you half of (the amount) I said. They would say: This is true, and on this (equity) stand the heavens and the earth. We agreed that we should take (the amount which) you said.

The tradition mentioned above has also been narrated by Jafar bin Burqan through his chain and to the same effect. This version has: He said: He assessed, and after the words of kull saFara wa baida', he said: that is, gold and silver will belong to him.

Narrated Miqsam: When the Prophet ﷺ conquered Khaibar. He then narrated it like the tradition of Zaid (b. Abu al-Zarqa'). This version has: He then assessed the produce of the palm-trees and said: I take the job of picking the fruit myself, and I shall give you half of (the amount) I said.