Hadithcore
Sahih al-Bukhari, 2166
sahih

Narrated `Abdullah:

We used to go ahead to meet the caravan and used to buy foodstuff from them. The Prophet (ﷺ) forbade us to sell it till it was carried to the market.

حَدَّثَنَا مُوسَى بْنُ إِسْمَاعِيلَ، حَدَّثَنَا جُوَيْرِيَةُ، عَنْ نَافِعٍ، عَنْ عَبْدِ اللَّهِ ـ رضى الله عنه ـ قَالَ كُنَّا نَتَلَقَّى الرُّكْبَانَ فَنَشْتَرِي مِنْهُمُ الطَّعَامَ، فَنَهَانَا النَّبِيُّ صلى الله عليه وسلم أَنْ نَبِيعَهُ حَتَّى يُبْلَغَ بِهِ سُوقُ الطَّعَامِ‏.‏ قَالَ أَبُو عَبْدِ اللَّهِ هَذَا فِي أَعْلَى السُّوقِ، يُبَيِّنُهُ حَدِيثُ عُبَيْدِ اللَّهِ‏.‏

References2 variants
In-Book Reference
Book 34, Hadith 117
USC-MSA web (English) reference
Vol. 3, Book 34, Hadith 375 (deprecated numbering scheme)
Sharh · explanationclick to expand
Human beings are infused with an inclination to love what benefits them and do what best serves their personal interests even if it harms others, and therefore, the Laws of Islam provisions were prescribed to restrain the evil-enjoining self. This hadeeth highlights the Laws of Islam provisions that refine human greed and keep it in check. ‘AbdullahIbn ‘Umar (may Allah be pleased with him) stated that they used to go out to meet with the trading caravans and buy foodstuff from the traders before they arrived at the marketplace, and resell the purchased commodities there before carrying them to the marketplaces. The Prophet ﷺ forbade them from reselling the purchased commodities in the purchase place and commanded them instead to carry the purchased goods to the marketplace and then resell them there. It has been reported in Saheeh Al-Bukhaaree and Saheeh Muslim that the Prophet ﷺ forbade going out to meet the trading caravans and purchasing the commodities outside the marketplace. To reconcile between these two hadeeths, it could be said that when a sales transaction is conducted, a buyer must not resell the purchased commodity before it is transferred to the marketplace. The hadeeth highlights the Prophet’sﷺ keenness to preserve the best interests of Muslims and his kindness towards them, even with regard to their worldly affairs. It is also deduced from the hadeeth that it is forbidden to apply ways of sale that lead to monopoly and price spikes. .