«الدينار بالدينار لا فضل بينهما والدرهم بالدرهم لا فضل بينهما»
The Prophet (peace and blessings be upon him) said:
"A dinar for a dinar, with no excess between them, and a dirham for a dirham, with no excess between them either."
Hadith Referenceصحیح الجامع الصغیر / حرف الدال / 3422