(3) باب مَنْ بَاعَ عَلَى الضَّعِيفِ وَنَحْوِهِ
Narrated Ibn `Umar:
A man was often cheated in buying. The Prophet (ﷺ) said to him, "When you buy something, say (to the seller), No cheating." The man used to say so thenceforward . (DE)
Reference (DE): Sahih al-Bukhari 2414 (DE)
In-book reference (DE): Book 44, Hadith 5 (DE)
USC-MSA web (English) reference(deprecated numbering scheme): Vol. 3, Book 41, Hadith 597 (DE)