Sunan an-Nasa'i, Volume 4, Book 35, Hadith 3961 (DarusSalam) ⓘ

It was narrated from Ibn 'Umar that the Prophet gave the datepalms of Khaibar and their land to the Jews of Khaibar, on condition that they would take care of them at their expense, and the Messenger of Allah would have half of whatever they produced.

أَخْبَرَنَا قُتَيْبَةُ، قَالَ حَدَّثَنَا اللَّيْثُ، عَنْ مُحَمَّدِ بْنِ عَبْدِ الرَّحْمَنِ، عَنْ نَافِعٍ، عَنِ ابْنِ عُمَرَ، رضى الله عَنْهُمَا أَنَّ النَّبِيَّ صلى الله عليه وسلم دَفَعَ إِلَى يَهُودِ خَيْبَرَ نَخْلَ خَيْبَرَ وَأَرْضَهَا عَلَى أَنْ يَعْمَلُوهَا مِنْ أَمْوَالِهِمْ وَأَنَّ لِرَسُولِ اللَّهِ صلى الله عليه وسلم شَطْرَ مَا يَخْرُجُ مِنْهَا‏.‏‏