Hadith 2240 - Sales in which a Price is paid for Goods to be Delivered Later (As-Salam) - Sahih Al-Bukhari - صحيح البخاري - Collection of Actions, Sayings and Teachings of Prophet Muhammad (صلى الله عليه و سلم) - Kutub as-Sittah

35. Sales in which a Price is paid for Goods to be Delivered Later (As-Salam) - كتاب السلم

2) Chapter: As-Salam for a known specified weight

Narrated Ibn Abi Najih:

as above, saying, "He should pay the price in advance for a specified measure and for a specified period."

Reference: 2240
English reference: Vol. 3, Book 35, Hadith 444
In-book reference: Book 35, Hadith 4
Grade: Sahih
Read this hadith from Darussalam Collection

2) باب السَّلَمِ فِي وَزْنٍ مَعْلُومٍ

حَدَّثَنَا عَلِيٌّ، حَدَّثَنَا سُفْيَانُ، قَالَ حَدَّثَنِي ابْنُ أَبِي نَجِيحٍ، وَقَالَ، ‏‏‏.‏ "‏ فَلْيُسْلِفْ فِي كَيْلٍ مَعْلُومٍ إِلَى أَجَلٍ مَعْلُومٍ ‏"