Sahih al-Bukhari 4248
Narrated `Abdullah:
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.
حَدَّثَنَا مُوسَى بْنُ إِسْمَاعِيلَ، حَدَّثَنَا جُوَيْرِيَةُ، عَنْ نَافِعٍ، عَنْ عَبْدِ اللَّهِ ـ رضى الله عنه ـ قَالَ أَعْطَى النَّبِيُّ صلى الله عليه وسلم خَيْبَرَ الْيَهُودَ أَنْ يَعْمَلُوهَا وَيَزْرَعُوهَا، وَلَهُمْ شَطْرُ مَا يَخْرُجُ مِنْهَا‏.‏