(7) باب مَا يُنْهَى مِنَ الْخِدَاعِ فِي الْبُيُوعِ
Narrated `Abdullah bin `Umar:
A man mentioned to the Prophet (ﷺ) that he had always been cheated in bargains. The Prophet (ﷺ) said, "Whenever you do bargain, say, 'No cheating.'" (ID)
Reference (ID): Sahih al-Bukhari 6964 (ID)
In-book reference (ID): Book 90, Hadith 11 (ID)
USC-MSA web (English) reference(deprecated numbering scheme): Vol. 9, Book 86, Hadith 94 (ID)