Riyad as-SalihinChapter 17Hadith 903
Full Sharh — Riyad as-Salihin 903
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.
English Translation
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."'.
Source
Riyad as-Salihin(رياض الصالحين)
The Book of the Prohibited actions
Hadith Number
903