Sahih al-Bukhari 6852
Sahih al-Bukhari · Book 86: Limits and Punishments set by Allah (Hudood) · What punishment may be inflicted on the person so that they may not commit the same sin again, or so that they may learn good manners
Narrated `Abdullah bin `Umar:
حَدَّثَنِي عَيَّاشُ بْنُ الْوَلِيدِ ، حَدَّثَنَا عَبْدُ الأَعْلَى ، حَدَّثَنَا مَعْمَرٌ ، عَنِ الزُّهْرِيِّ ، عَنْ سَالِمٍ ، عَنْ عَبْدِ اللَّهِ بْنِ عُمَرَ ، أَنَّهُمْ كَانُوا يُضْرَبُونَ عَلَى عَهْدِ رَسُولِ اللَّهِ صلى الله عليه وسلم إِذَا اشْتَرَوْا طَعَامًا جِزَافًا أَنْ يَبِيعُوهُ فِي مَكَانِهِمْ حَتَّى يُئْوُوهُ إِلَى رِحَالِهِمْ.
Those people who used to buy foodstuff at random (without weighing or measuring it) were beaten in the lifetime of Allah's Messenger (ﷺ) if they sold it at the very place where they had bought it, till they carried it to their dwelling places.