(Concerning exchange) that he heard Allah's Messenger (ﷺ) saying, "Do not sell gold for gold unless equal in weight, and do not sell silver unless equal in weight."
Sahih al-Bukhari Book 34, Hadith 126
← Previous Hadith Allah's Messenger (ﷺ) said, "Don't sell gold for gold unless equal in weight, nor silver for silver unless equal in weight, but you could sell gold for silver or silver for gold as you like."

Sahih al-Bukhari Book 34, Hadith 125 Next Hadith → Allah's Messenger (ﷺ) said, "Do not sell gold for gold unless equivalent in weight, and do not sell less amount for greater amount or vice versa; and do not sell silver for silver unless equivalent in weight, and do not sell less amount for greater amount or vice versa and do not sell gold or silver that is not present at the moment of exchange for gold or silver that is present.

Sahih al-Bukhari Book 34, Hadith 127