Hadithcore
Riyad as-Salihin, 1582

Ibn 'Umar (May Allah be pleased with them) said:

A man mentioned to the Messenger of Allah (ﷺ) that he was often deceived in dealings. The Messenger of Allah (ﷺ) said to him, "When you enter into a transaction you should say: "There should be no deception."' <b>[Al-Bukhari and Muslim]</b>.

وعنه قال‏:‏ ذكر رجل لرسول الله صلى الله عليه وسلم أنه يُخدع في البيوع فقال رسول الله صلى الله عليه وسلم‏:‏ ‏"‏من بايعت‏؟‏ فقل ‏:‏ لا خلابة‏"‏ ‏(‏‏(‏متفق عليه‏)‏‏)‏‏.‏ ‏"‏الخِلابة‏"‏ بخاء معجمة مكسورة، وباء موحدة‏:‏ وهي الخديعة‏.‏

References1 variant
In-Book Reference
Book 17, Hadith 72
Sharh · explanationclick to expand
<b>Guidance from the Hadith:</b><br> 1) Cheating in transactions is prohibited as it is not consistent with the Islamic code of morals.<br> 2) The mercy of the Messenger of Allah (may Allah’s peace and blessings be upon him) is manifested when he instructed the ignorant one on his mistake; he did not say to him that the law does not protect the fools.<br> <br> <b>Benefit:</b><br> The Hadith highlights the permissibility of selling with the condition of Khiyār (choice), meaning that the buyer stipulates, for example, the condition to return the commodity to its seller if he finds it defective.
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