Sunan An Nasai 4586

أَخْبَرَنِي أَحْمَدُ بْنُ يَحْيَى،‏‏‏‏ عَنْ أَبِي نُعَيْمٍ،‏‏‏‏ قَالَ:‏‏‏‏ حَدَّثَنَا حَمَّادُ بْنُ سَلَمَةَ،‏‏‏‏ عَنْ سِمَاكِ بْنِ حَرْبٍ،‏‏‏‏ عَنْ سَعِيدِ بْنِ جُبَيْرٍ،‏‏‏‏ عَنْ ابْنِ عُمَرَ،‏‏‏‏ قَالَ:‏‏‏‏ كُنْتُ أَبِيعُ الْإِبِلَ بِالْبَقِيعِ فَأَبِيعُ بِالدَّنَانِيرِ وَآخُذُ الدَّرَاهِمَ،‏‏‏‏ فَأَتَيْتُ النَّبِيَّ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ فِي بَيْتِ حَفْصَةَ،‏‏‏‏ فَقُلْتُ:‏‏‏‏ يَا رَسُولَ اللَّهِ،‏‏‏‏ إِنِّي أُرِيدُ أَنْ أَسْأَلَكَ إِنِّي أَبِيعُ الْإِبِلَ بِالْبَقِيعِ فَأَبِيعُ بِالدَّنَانِيرِ وَآخُذُ الدَّرَاهِمَ ؟،‏‏‏‏ قَالَ:‏‏‏‏ لَا بَأْسَ أَنْ تَأْخُذَهَا بِسِعْرِ يَوْمِهَا،‏‏‏‏ مَا لَمْ تَفْتَرِقَا وَبَيْنَكُمَا شَيْءٌ .

It was narrated that Ibn 'Umar said: I used to sell camels at Al-Baqi and I would sell Dinars in exchange for Dirhams. I came to the Prophet in the house of Hafsah and said: 'O Messenger of Allah, I want to ask you: I sell camels in Al-Baqi and I sell Dinars in exchange for Dirhams. He said: 'There is nothing wrong with it if you take the price on that day, unless you depart when there is still unfinished business between you both (buyer and seller). '