Sahih al-Bukhari, Book 34, Hadith 122 (In-Book) ⓘ
Narrated Ibn `Umar: Allah's Messenger forbade Muzabana; and Muzabana is the selling of fresh dates for dried old dates by measure, and the selling of fresh grapes for dried grapes by measure.
حَدَّثَنَا إِسْمَاعِيلُ، حَدَّثَنَا مَالِكٌ، عَنْ نَافِعٍ، عَنْ عَبْدِ اللَّهِ بْنِ عُمَرَ ـ رضى الله عنهما ـ أَنَّ رَسُولَ اللَّهِ صلى الله عليه وسلم نَهَى عَنِ الْمُزَابَنَةِ، وَالْمُزَابَنَةُ بَيْعُ الثَّمَرِ بِالتَّمْرِ كَيْلاً، وَبَيْعُ الزَّبِيبِ بِالْكَرْمِ كَيْلاً.
also referenced under: Hadith 2171 (DarusSalam) & Volume 3, Book 34, Hadith 380 (USC-MSA)