(14) باب تَحْرِيمِ بَيْعِ الرُّطَبِ بِالتَّمْرِ إِلاَّ فِي الْعَرَايَا
'Abdullah (b. Umar) reported that Allah's Apostle (ﷺ) forbade Muzabana, i. e. buying of fresh dates (on) the trees for dry dates by measure, and the buying of grapes for raisins by measure and the selling of field of corn for corn by measure.
Reference: Sahih Muslim 1542 b
In-book reference: Book 21, Hadith 93
USC-MSA web (English) reference(deprecated numbering scheme): Book 10, Hadith 3694