وَعَنْ حَكِيمِ بْنِ حِزَامٍ قَالَ: نَهَانِي رَسُولُ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ أَنْ أَبِيعَ مَا ليسَ عندِي. رَوَاهُ التِّرْمِذِيّ فِي رِوَايَةٍ لَهُ وَلِأَبِي دَاوُدَ وَالنَّسَائِيُّ: قَالَ: قُلْتُ: يَا رَسُولَ اللَّهِ يَأْتِينِي الرَّجُلُ فَيُرِيدُ مِنِّي الْبَيْعَ وَلَيْسَ عِنْدِي فَأَبْتَاعُ لَهُ مِنَ السُّوقِ قَالَ: «لَا تبِعْ مَا ليسَ عندَكَ»
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.”
Source: sunnah.com
Version: urn:5821081