Sahih Bukhari Volume 5, Book 64, Hadith 4122

حَدَّثَنَا ابْنُ أَبِي الأَسْوَدِ، حَدَّثَنَا مُعْتَمِرٌ، وَحَدَّثَنِي خَلِيفَةُ، حَدَّثَنَا مُعْتَمِرٌ، قَالَ سَمِعْتُ أَبِي، عَنْ أَنَسٍ ـ رضى الله عنه ـ قَالَ كَانَ الرَّجُلُ يَجْعَلُ لِلنَّبِيِّ صلى الله عليه وسلم النَّخَلاَتِ حَتَّى افْتَتَحَ قُرَيْظَةَ وَالنَّضِيرَ، وَإِنَّ أَهْلِي أَمَرُونِي أَنْ آتِيَ النَّبِيَّ صلى الله عليه وسلم فَأَسْأَلَهُ الَّذِينَ كَانُوا أَعْطَوْهُ أَوْ بَعْضَهُ‏.‏ وَكَانَ النَّبِيُّ صلى الله عليه وسلم قَدْ أَعْطَاهُ أُمَّ أَيْمَنَ، فَجَاءَتْ أُمُّ أَيْمَنَ فَجَعَلَتِ الثَّوْبَ فِي عُنُقِي تَقُولُ كَلاَّ وَالَّذِي لاَ إِلَهَ إِلاَّ هُوَ لاَ يُعْطِيكَهُمْ وَقَدْ أَعْطَانِيهَا، أَوْ كَمَا قَالَتْ، وَالنَّبِيُّ صلى الله عليه وسلم يَقُولُ ‏"‏ لَكِ كَذَا ‏"‏‏.‏ وَتَقُولُ كَلاَّ وَاللَّهِ‏.‏ حَتَّى أَعْطَاهَا، حَسِبْتُ أَنَّهُ قَالَ ‏"‏ عَشَرَةَ أَمْثَالِهِ ‏"‏‏.‏ أَوْ كَمَا قَالَ‏

Narrated By Anas : Some (of the Ansar) used to present date palm trees to the Prophet till Banu Quraiza and Banu An-Nadir were conquered (then he returned to the people their date palms). My people ordered me to ask the Prophet to return some or all the date palms they had given to him, but the Prophet had given those trees to Um Aiman. On that, Um Aiman came and put the garment around my neck and said, "No, by Him except Whom none has the right to be worshipped, he will not return those trees to you as he (i.e. the Prophet) has given them to me." The Prophet go said (to her), "Return those trees and I will give you so much (instead of them)." But she kept on refusing, saying, "No, by Allah," till he gave her ten times the number of her date palms.