Sahih Muslim , Book 22, Hadith 2 (In-Book) ⓘ

Ibn Umar (Allah be pleased with them) reported: Allah's Messenger handed over the land of Khaibar (on the condition) of the share of produce of fruits and harvest, and he also gave to his wives every year one hundred wasqs: eighty wasqs of dates and twenty wasqs of barley. When 'Umar became the caliph he distributed the (lands and trees) of Khaibar, and gave option to the wives of Allah's Apostle to earmark for themselves the land and water or stick to the wasqs (that they got) every year. They differed in this matter. Some of them opted for land and water, and some of them opted for wasqs every year. 'A'isha and Hafsa were among those who opted for land and water.

وَحَدَّثَنِي عَلِيُّ بْنُ حُجْرٍ السَّعْدِيُّ، حَدَّثَنَا عَلِيٌّ، - وَهُوَ ابْنُ مُسْهِرٍ - أَخْبَرَنَا عُبَيْدُ، اللَّهِ عَنْ نَافِعٍ، عَنِ ابْنِ عُمَرَ، قَالَ أَعْطَى رَسُولُ اللَّهِ صلى الله عليه وسلم خَيْبَرَ بِشَطْرِ مَا يَخْرُجُ مِنْ ثَمَرٍ أَوْ زَرْعٍ فَكَانَ يُعْطِي أَزْوَاجَهُ كَلَّ سَنَةٍ مِائَةَ وَسْقٍ ثَمَانِينَ وَسْقًا مِنْ تَمْرٍ وَعِشْرِينَ وَسْقًا مِنْ شَعِيرٍ فَلَمَّا وَلِيَ عُمَرُ قَسَمَ خَيْبَرَ خَيَّرَ أَزْوَاجَ النَّبِيِّ صلى الله عليه وسلم أَنْ يُقْطِعَ لَهُنَّ الأَرْضَ وَالْمَاءَ أَوْ يَضْمَنَ لَهُنَّ الأَوْسَاقَ كُلَّ عَامٍ فَاخْتَلَفْنَ فَمِنْهُنَّ مَنِ اخْتَارَ الأَرْضَ وَالْمَاءَ وَمِنْهُنَّ مَنِ اخْتَارَ الأَوْسَاقَ كُلَّ عَامٍ فَكَانَتْ عَائِشَةُ وَحَفْصَةُ مِمَّنِ اخْتَارَتَا الأَرْضَ وَالْمَاءَ ‏.‏