Is barley and other grains subject to the same ruling as wheat regarding exchange?
Chapter on Riba (Usury) and Exchange (Sarf)
Al-Mughni
Book of Sales
Primary text
The ruling concerning barley and all other grains is identical to the ruling concerning wheat. Wheat and products made from it may be exchanged for other grains and their products due to the absence of a requirement for sameness (mithl) between them in exchange.