Hakim b. Hizam said God's Messenger forbade him to sell anything which was not in his possession. Tirmidhi transmitted it. In a version by Abu Dawud and Nasa’i, he had said, “Messenger of God, a man comes to me and wants me to sell him something, but I do not have it and so I buy it for him from the market.” He replied, “Do not sell what you do not possess.”
Hadith Referenceمشكوة المصابيح / كتاب البيوع / 2867
Hadith Gradingالألبانی:صَحِيح | زبیر علی زئی:إسناده حسن
Hadith Takhrij´تحقيق و تخريج: محدث العصر حافظ زبير على زئي رحمه الله` «إسناده حسن، رواه الترمذي (1232. 1233 وقال: حسن) و أبو داود (3503) والنسائي (289/7 ح4717) والرواية الثانية في مصابيح السنة (2101)»