5 chains merged

Do not sell a dinar for two dinars and one dirham for two dirhams.

Let dinar be exchanged for dinar, with no addition on either side and dirham be exchanged for dirham with no addition on either side.

Yahya related to me from Malik from Musa ibn Abi Tamim from Abu'l Hubab Said ibn Yasar from Abu Hurayra that the Messenger of Allah, (ﷺ), said, "A dinar for a dinar, a dirham for a dirham, no excess between the two."

there was a man whose mental faculties were lacking, and he used to buy and sell. His family came to the Prophet (ﷺ) and said: "O Prophet (ﷺ) of Allah stop him." So the Prophet (ﷺ) of Allah called him, and told him not to do that. He said:

"Dinar for Dinar Dirham for Dirham, no difference between them."