The Prophet ﷺ gave (the land of) Khaibar to the Jews (of Khaibar) on condition that they would work on it and cultivate it and they would have half of its yield.  

أَعْطَى النَّبِيُّ ﷺ خَيْبَرَ الْيَهُودَ أَنْ يَعْمَلُوهَا وَيَزْرَعُوهَا وَلَهُمْ شَطْرُ مَا يَخْرُجُ مِنْهَا