(17) باب بَيْعِ الْقِلاَدَةِ فِيهَا خَرَزٌ وَذَهَبٌ
Fadala b. 'Ubaid reported:
We were in the company of Allah's Messenger ( may peace be upon him) on the day (of the Victory of) Khaibar, and made transaction with the Jews for the 'uqiya of gold for the dinars or three (gold coins), whereupon Allah's Messenger (ﷺ) said: Do not sell gold for gold but for equal weight
Reference: Sahih Muslim 1591 d
In-book reference: Book 22, Hadith 117
USC-MSA web (English) reference(deprecated numbering scheme): Book 10, Hadith 3866