‘Abdullah bin ‘Umar (may Allah be pleased with them) says: I used to sell camels in the market of Baqi‘. I would sell them for dinars and take silver in exchange, and I would sell them for silver and take dinars in exchange. I came to the Messenger of Allah (peace be upon him) and saw that he was coming out of the house of Hafsah (may Allah be pleased with her), so I asked him about this. He said:“There is no harm in doing so at the current price.” Imam Tirmidhi says:
1- We know this hadith as being marfu‘ only from the narration of Simak bin Harb,
2- Simak narrated it from Sa‘id bin Jubair, and Sa‘id from Ibn ‘Umar, and Dawud bin Abi Hind narrated this hadith from Sa‘id bin Jubair, and Sa‘id from Ibn ‘Umar as mawquf,
3- Some people of knowledge act upon this hadith, that if someone takes silver in exchange for gold or gold in exchange for silver, there is no harm in it. This is also the opinion of Ahmad and Ishaq,
4- And some people of knowledge among the Companions and others considered it disliked.