صحيح البخاري Sahih Bukhari كتاب البيوع The Book of Sales (Bargains)
بَابُ مَنْ أَجْرَى أَمْرَ الأَمْصَارِ عَلَى مَا يَتَعَارَفُونَ بَيْنَهُمْ فِي الْبُيُوعِ وَالإِجَارَةِ وَالْمِكْيَالِ، وَالْوَزْنِ، وَسُنَنِهِمْ عَلَى نِيَّاتِهِمْ وَمَذَاهِبِهِمِ الْمَشْهُورَةِ:

(95) Chapter. In cases where there is no fixed judgement, the traditions and conventions of each community are to be referred to, to deduce a judgement in such matters as sales, renting, measuring and weighing.

3 hadith
Hadith 2210
حَدَّثَنَا عَبْدُ اللَّهِ بْنُ يُوسُفَ ، أَخْبَرَنَا مَالِكٌ ، عَنْ حُمَيْدٍ الطَّوِيلِ ، عَنْ أَنَسِ بْنِ مَالِكٍ رَضِيَ اللَّهُ عَنْهُ ، قَالَ : " حَجَمَ رَسُولَ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ أَبُو طَيْبَةَ " فَأَمَرَ لَهُ رَسُولُ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ بِصَاعٍ مِنْ تَمْرٍ ، وَأَمَرَ أَهْلَهُ أَنْ يُخَفِّفُوا عَنْهُ مِنْ خَرَاجِهِ " .
Narrated Anas bin Malik: Abu Taiba cupped Allah's Apostle and so Allah's Apostle ordered that a Sa of dates be paid to him and ordered his masters (for he was a slave) to reduce his tax.
Hadith Reference Sahih Bukhari / The Book of Sales (Bargains) / Hadith: 2210
Hadith Grading محدثین: أحاديث صحيح البخاريّ كلّها صحيحة
Hadith 2211
حَدَّثَنَا أَبُو نُعَيْمٍ ، حَدَّثَنَا سُفْيَانُ ، عَنْ هِشَامٍ ، عَنْ عُرْوَةَ ، عَنْ عَائِشَةَ رَضِيَ اللَّهُ عَنْهَا ، قَالَت هِنْدٌ أُمُّ مُعَاوِيَةَ لِرَسُولِ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ : " إِنَّ أَبَا سُفْيَانَ رَجُلٌ شَحِيحٌ ، فَهَلْ عَلَيَّ جُنَاحٌ أَنْ آخُذَ مِنْ مَالِهِ سِرًّا ؟ قَالَ : خُذِي أَنْتِ وَبَنُوكِ مَا يَكْفِيكِ بِالْمَعْرُوفِ " .
Narrated `Aisha: Hind, the mother of Mu'awiya said to Allah's Apostle, "Abu Sufyan (her husband) is a miser. Am I allowed to take from his money secretly?" The Prophet said to her, "You and your sons may take what is sufficient reasonably and fairly."
Hadith Reference Sahih Bukhari / The Book of Sales (Bargains) / Hadith: 2211
Hadith Grading محدثین: أحاديث صحيح البخاريّ كلّها صحيحة
Hadith 2212
حَدَّثَنِي إِسْحَاقُ ، حَدَّثَنَا ابْنُ نُمَيْرٍ ، أَخْبَرَنَا هِشَامٌ . ح وحَدَّثَنِي مُحَمَّدُ بْنُ سَلَّامٍ ، قَالَ : سَمِعْتُ عُثْمَانَ بْنَ فَرْقَدٍ ، قَالَ : سَمِعْتُ هِشَامَ بْنَ عُرْوَةَ يُحَدِّثُ ، عَنْ أَبِيهِ ، أَنَّهُ سَمِعَ عَائِشَةَ رَضِيَ اللَّهُ عَنْهَا ، تَقُولُ : " وَمَنْ كَانَ غَنِيًّا فَلْيَسْتَعْفِفْ وَمَنْ كَانَ فَقِيرًا فَلْيَأْكُلْ بِالْمَعْرُوفِ سورة النساء آية 6 ، أُنْزِلَتْ فِي وَالِي الْيَتِيمِ الَّذِي يُقِيمُ عَلَيْهِ ، وَيُصْلِحُ فِي مَالِهِ ، إِنْ كَانَ فَقِيرًا أَكَلَ مِنْهُ بِالْمَعْرُوفِ " .
Narrated Hisham bin `Urwa from his father: who heard Aisha saying, "The Holy Verse; 'Whoever amongst the guardians is rich, he should take no wages (from the property of the orphans) but If he is poor, let him have for himself what is just and reasonable (according to his labors)' (4.6) was revealed concerning the guardian of the orphans who looks after them and manages favorably their financial affairs; If the guardian Is poor, he could have from It what Is just and reasonable, (according to his labors).
Hadith Reference Sahih Bukhari / The Book of Sales (Bargains) / Hadith: 2212
Hadith Grading محدثین: أحاديث صحيح البخاريّ كلّها صحيحة