Narrated 'Abdullah bin 'Umar (ra):
I bartered my property in Khaibar to 'Uthman (chief of the faithful believers) for his property in Al-Wadi. When we finished the deal, I left immediately and got out of his house lest he should cancel the deal, for the tradition was that they buyer and the seller had the option of canceling the bargain unless they separated. When out deal was completed, I came to know that I have been unfair to 'Uthman, for by selling him my land I caused him to be in a land of Thamud, at a distance of three days journey from Al-Madina, while he made me neared to Al-Madina, at a distance of three days journey from my former land.
قَالَ أَبُو عَبْدِ اللَّهِ وَقَالَ اللَّيْثُ حَدَّثَنِي عَبْدُ الرَّحْمَنِ بْنُ خَالِدٍ، عَنِ ابْنِ شِهَابٍ، عَنْ سَالِمِ بْنِ عَبْدِ اللَّهِ، عَنْ عَبْدِ اللَّهِ بْنِ عُمَرَ ـ رضى الله عنهما ـ قَالَ بِعْتُ مِنْ أَمِيرِ الْمُؤْمِنِينَ عُثْمَانَ مَالاً بِالْوَادِي بِمَالٍ لَهُ بِخَيْبَرَ، فَلَمَّا تَبَايَعْنَا رَجَعْتُ عَلَى عَقِبِي حَتَّى خَرَجْتُ مِنْ بَيْتِهِ، خَشْيَةَ أَنْ يُرَادَّنِي الْبَيْعَ، وَكَانَتِ السُّنَّةُ أَنَّ الْمُتَبَايِعَيْنِ بِالْخِيَارِ حَتَّى يَتَفَرَّقَا، قَالَ عَبْدُ اللَّهِ فَلَمَّا وَجَبَ بَيْعِي وَبَيْعُهُ رَأَيْتُ أَنِّي قَدْ غَبَنْتُهُ بِأَنِّي سُقْتُهُ إِلَى أَرْضِ ثَمُودٍ بِثَلاَثِ لَيَالٍ وَسَاقَنِي إِلَى الْمَدِينَةِ بِثَلاَثِ لَيَالٍ.
