Sahih al-Bukhari 2134
صحيح البخاري#2134SahihNarrated Az-Zuhri from Malik bin Aus:That the latter said, "Who has change?" Talha said, "I (will have change) when our storekeeper comes from the forest." Malik bin Aus narrated from `Umar bin Al-Khattab: Allah's Messenger (ﷺ) said, "The bartering of gold for gold is Riba (usury), except if it is from hand to hand and equal in amount, and wheat grain for wheat grain is usury except if it is from hand to hand and equal in amount, and dates for dates is usury except if it is from hand to hand and equal in amount, and barley for barley is usury except if it is from hand to hand and equal in amount
Scholarly Authentication
We show the most cautious grade (weakest-wins) as the overall label. Individual scholars graded it as follows:
Every narration in Sahih al-Bukhari is accepted as Sahih (authentic) by the established status of the book.
In-book reference: 34:86