The Prophet ﷺ came to Medina and the people used to pay in advance the price of dates to be delivered within two or three years. He said (to them), "Whoever pays in advance the price of a thing to be delivered later should pay it for a specified measure at specified weight for a specified period."  

قَدِمَ النَّبِيُّ ﷺ الْمَدِينَةَ وَهُمْ يُسْلِفُونَ بِالتَّمْرِ السَّنَتَيْنِ وَالثَّلاَثَ فَقَالَ مَنْ أَسْلَفَ فِي شَىْءٍ فَفِي كَيْلٍ مَعْلُومٍ وَوَزْنٍ مَعْلُومٍ إِلَى أَجَلٍ مَعْلُومٍ  

The Prophet ﷺ came to Medina and the people used to pay in advance the prices of fruits to be delivered within two to three years. The Prophet ﷺ said (to them), "Buy fruits by paying their prices in advance on condition that the fruits are to be delivered to you according to a fixed specified measure within a fixed specified period." Ibn Najih said, " ... by specified measure and specified weight."  

قَدِمَ النَّبِيُّ ﷺ الْمَدِينَةَ وَهُمْ يُسْلِفُونَ فِي الثِّمَارِ السَّنَتَيْنِ وَالثَّلاَثَ فَقَالَ أَسْلِفُوا فِي الثِّمَارِ فِي كَيْلٍ مَعْلُومٍ إِلَى أَجَلٍ مَعْلُومٍ وَقَالَ عَبْدُ اللَّهِ بْنُ الْوَلِيدِ حَدَّثَنَا سُفْيَانُ حَدَّثَنَا ابْنُ أَبِي نَجِيحٍ وَقَالَ فِي كَيْلٍ مَعْلُومٍ وَوَزْنٍ مَعْلُومٍ  

Those who pay in advance for anything must do so for a specified weight and for a definite time.  

قَدِمَ النَّبِيُّ ﷺ الْمَدِينَةَ وَهُمْ يُسْلِفُونَ فِي الثِّمَارِ السَّنَةَ وَالسَّنَتَيْنِ فَقَالَ مَنْ أَسْلَفَ فِي تَمْرٍ فَلْيُسْلِفْ فِي كَيْلٍ مَعْلُومٍ وَوَزْنٍ مَعْلُومٍ إِلَى أَجَلٍ مَعْلُومٍ  

"I heard Ibn 'Abbas say: 'When the Prophet came (to al-Madinah), they used to pay in advance for dates, two or three years in advance. He forbade them that and said: 'whoever pays in advance for dates, let him pay for a known amount or a known weight, to be delivered at a known time'''  

قَدِمَ رَسُولُ اللَّهِ ﷺ الْمَدِينَةَ وَهُمْ يُسْلِفُونَ فِي التَّمْرِ السَّنَتَيْنِ وَالثَّلاَثَ فَنَهَاهُمْ وَقَالَ مَنْ أَسْلَفَ سَلَفًا فَلْيُسْلِفْ فِي كَيْلٍ مَعْلُومٍ وَوَزْنٍ مَعْلُومٍ إِلَى أَجَلٍ مَعْلُومٍ  

When the Messenger of Allah ﷺ came to Medina, they were paying one, two and three years in advance for fruits, so he said: Those who pay in advance for anything, must do for a specified measure and weight with a specified time fixed. (Using translation from Abū Dāʾūd 3463)   

قَدِمَ رَسُولُ اللهِ ﷺ وَهُمْ يُسْلِفُونَ فِي الثِّمَارِ السَّنَةَ وَالسَّنَتَيْنِ أَوِ السَّنَتَيْنِ وَالثَّلَاثَ فَقَالَ رَسُولُ اللهِ ﷺ سَلِّفُوا فِي الثِّمَارِ فِي كَيْلٍ مَعْلُومٍ وَوَزْنٍ مَعْلُومٍ وَوَقْتٍ مَعْلُومٍ  

"When the Prophet ﷺ came (to Al-Madinah), they used to pay in advance for dates, two or three years in advance. He said: 'Whoever pays in advance for dates, let him pay for a known amount or a known weight, to be delivered at a known time.’” (Using translation from Ibn Mājah 2280)   

قَدِمَ النَّبِيُّ ﷺ الْمَدِينَةَ وَهُمْ يُسَلِّفُونَ فِي التَّمْرِالسَّنَتَيْنِ وَالثَّلاثَ فَقَالَ مَنْ سَلَّفَ فَلْيُسَلِّفْ فِي كَيْلٍ مَعْلُومٍ وَوَزْنٍ مَعْلُومٍ إِلَى أَجَلٍ مَعْلُومٍ  

[Machine] The Messenger of Allah ﷺ arrived in Medina and the people were lending to one another. The Messenger of Allah ﷺ said to them, "Whoever lends should not lend except in a known measure and weight." Abu Al-Minhaal, whose name is Abdul Rahman bin Mut'im.  

قَدِمَ رَسُولُ اللَّهِ ﷺ الْمَدِينَةَ وَالنَّاسُ يُسْلِفُونَ فَقَالَ لَهُمْ رَسُولُ اللَّهِ ﷺ «مَنْ أَسْلَفَ فَلَا يُسْلِفْ إِلَّا فِي كَيْلٍ مَعْلُومٍ وَوَزْنٍ مَعْلُومٍ» أَبُو الْمِنْهَالِ هَذَا اسْمُهُ عَبْدُ الرَّحْمَنِ بْنُ مُطْعِمٍ  

Those who pay in advance for anything must do so for a specified weight and for a definite time. (Using translation from Muslim 1604a)  

قَدِمَ النَّبِيُّ ﷺ الْمَدِينَةَ وَهُمْ يُسْلِفُونَ فِي الثَّمَرِ السَّنَةَ وَالسَّنَتَيْنِ وَالثَّلَاثَ فَقَالَ «مَنْ أَسْلَفَ فَلْيُسْلِفْ فِي كَيْلٍ مَعْلُومٍ وَوَزْنٍ مَعْلُومٍ إِلَى أَجْلٍ مَعْلُومٍ»