An exchange of two counter-values (badalain) such as price for commodity (ba'i), currency for currency (sarf), price for usufruct (ijara),...

The sale (ba'i or bay') in which a type of money (naqd) is exchanged for money of its genus based...

The sale (ba'i or bay') in which a type of money (naqd) is exchanged for money of its genus based...