Language:
كتاب البيوع
34  
Sales and Trade
(19)
Chapter: To explain the good and bad points of the transaction
(19)
باب إِذَا بَيَّنَ الْبَيِّعَانِ وَلَمْ يَكْتُمَا وَنَصَحَا
Sahih al-Bukhari 2079

Narrated Hakim bin Hizam:

Allah's Messenger (ﷺ) said, "The seller and the buyer have the right to keep or return goods as long as they have not parted or till they part; and if both the parties spoke the truth and described the defects and qualities (of the goods), then they would be blessed in their transaction, and if they told lies or hid something, then the blessings of their transaction would be lost."

حَدَّثَنَا سُلَيْمَانُ بْنُ حَرْبٍ، حَدَّثَنَا شُعْبَةُ، عَنْ قَتَادَةَ، عَنْ صَالِحٍ أَبِي الْخَلِيلِ، عَنْ عَبْدِ اللَّهِ بْنِ الْحَارِثِ، رَفَعَهُ إِلَى حَكِيمِ بْنِ حِزَامٍ ـ رضى الله عنه ـ قَالَ قَالَ رَسُولُ اللَّهِ صلى الله عليه وسلم ‏ "‏ الْبَيِّعَانِ بِالْخِيَارِ مَا لَمْ يَتَفَرَّقَا ـ أَوْ قَالَ حَتَّى يَتَفَرَّقَا ـ فَإِنْ صَدَقَا وَبَيَّنَا بُورِكَ لَهُمَا فِي بَيْعِهِمَا، وَإِنْ كَتَمَا وَكَذَبَا مُحِقَتْ بَرَكَةُ بَيْعِهِمَا ‏"‏‏.‏
Reference : Sahih al-Bukhari 2079
In-book reference : Book 34, Hadith 32
USC-MSA web (English) reference : Vol. 3, Book 34, Hadith 293
  (deprecated numbering scheme)