(12) باب مَنْ يُخْدَعُ فِي الْبَيْعِ
Abdullah b. Dinar narrated that he heard Ibn 'Umar (Allah be pleased with them) saying:
A man mentioned to the Messenger of Allah (ﷺ) that he was deceived in a business transaction, whereupon Allah's Messenger (ﷺ) said: When you enter into a transaction, say: There should be no attempt to deceive.
Reference: Sahih Muslim 1533 a
In-book reference: Book 21, Hadith 59
USC-MSA web (English) reference(deprecated numbering scheme): Book 10, Hadith 3663