When Allah bestowed Khaybar on His Prophet ﷺ as fay' (as a result of conquest without fighting), the Messenger of Allah ﷺ allowed (them) to remain there as they were before, and apportioned it between him and them. He then sent Abdullah ibn Rawahah who assessed (the amount of dates) upon them.
أَنَّهُ قَالَ أَفَاءَ اللَّهُ عَلَى رَسُولِهِ خَيْبَرَ فَأَقَرَّهُمْ رَسُولُ اللَّهِ ﷺ كَمَا كَانُوا وَجَعَلَهَا بَيْنَهُ وَبَيْنَهُمْ فَبَعَثَ عَبْدَ اللَّهِ بْنَ رَوَاحَةَ فَخَرَصَهَا عَلَيْهِمْ