[Machine] I came to Nafi' and he threw a bag to me, so I sat on it and he dictated to me on the tablets. He said, "I heard Abdullah bin Umar saying, 'The Messenger of Allah ﷺ said: When the two parties to a transaction have concluded the sale, then each one of them has the option to cancel the sale, as long as they have not separated or the sale has not been concluded with an option.' He said, 'So whenever Ibn Umar concluded a transaction, and wanted to take back what he had sold, he would walk a little, then he would go back.'"  

أَتَيْتُ نَافِعًا فَطَرَحَ إِلِيَّ حَقِيبَةً فَجَلَسْتُ عَلَيْهَا فَأَمْلَى عَلَيَّ فِي أَلْوَاحِي قَالَ سَمِعْتُ عَبْدَ اللهِ بْنَ عُمَرَ يَقُولُ قَالَ رَسُولُ اللهِ ﷺ إِذَا تَبَايَعَ الْمُتَبَايِعَانِ فَكُلُّ وَاحِدٍ مِنْهُمَا بِالْخِيَارِ مِنْ بَيْعِهِ مَا لَمْ يَتَفَرَّقَا أَوْ يَكُونُ بَيْعُهُمَا عَنْ خِيَارٍ قَالَ فَكَانَ ابْنُ عُمَرَ إِذَا تَبَايَعَ الْبَيْعَ فَأَرَادَ أَنْ يَجُبَّ مَشَى قَلِيلًا ثُمَّ رَجَعَ