Business Transactions which are Forbidden - Section 1 Mishkat al-Masabih 2849
Arabic hadith text
وَعَنِ ابْنِ عُمَرَ رَضِيَ اللَّهُ عَنْهُمَا قَالَ: قَالَ رَسُولُ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ: «لَا تَلَقَّوُا السِّلَعَ حَتَّى يُهْبَطَ بهَا إِلى السُّوق»
Translation
Ibn ‘Umar reported God’s Messenger as saying, “Do not go out to meet merchandise, [but wait] till it is brought down to the market.” (Bukhari and Muslim.)