Sahih Muslim Book: 23, Hadith: 4202

حَدَّثَنَا يَحْيَى بْنُ يَحْيَى، وَعَمْرٌو النَّاقِدُ، – وَاللَّفْظُ لِيَحْيَى قَالَ عَمْرٌو حَدَّثَنَا وَقَالَ يَحْيَى – أَخْبَرَنَا سُفْيَانُ بْنُ عُيَيْنَةَ عَنِ ابْنِ أَبِي نَجِيحٍ عَنْ عَبْدِ اللَّهِ بْنِ كَثِيرٍ عَنْ أَبِي الْمِنْهَالِ عَنِ ابْنِ عَبَّاسٍ قَالَ قَدِمَ النَّبِيُّ صلى الله عليه وسلم الْمَدِينَةَ وَهُمْ يُسْلِفُونَ فِي الثِّمَارِ السَّنَةَ وَالسَّنَتَيْنِ فَقَالَ ‏ “‏ مَنْ أَسْلَفَ فِي تَمْرٍ فَلْيُسْلِفْ فِي كَيْلٍ مَعْلُومٍ وَوَزْنٍ مَعْلُومٍ إِلَى أَجَلٍ مَعْلُومٍ‏”‏ ‏.‏ Ibn ‘Abbas (Allah be pleased with them) reported that when Allah’s Prophet (may peace be upon him) came to Medina, they were paying one and two years in advance for fruits, so he said:Those who pay in advance for anything must do so for a specified weight and for a definite time. Chain : Yahya bin Yahya bin Bukayr – ‘Amr bin al-Harith bin Ya’qub – Yahya bin Sa’id bin Farroukh al-Qatan – Sufyan bin ‘Uyaynah – ‘Abdullah bin Abi Najih – ‘Abdullah bin Kathir al-Dari – Siyar bin Salaama, Abu al-Minhal