Messenger of Allah ﷺ gave the land of Khaibar to the Jew's on the condition that they work on it and cultivate it, and be given half of its yield.  

أَنَّ رَسُولَ اللَّهِ ﷺ أَعْطَى خَيْبَرَ الْيَهُودَ عَلَى أَنْ يَعْمَلُوهَا وَيَزْرَعُوهَا وَلَهُمْ شَطْرُ مَا خَرَجَ مِنْهَا