What are the required specifications for a valid forward contract concerning cheese?

Chapter on Guaranteed Salaf (Advance Payment) for a Specified Term

Al-Mughni

Book of Sales

Book 12 · Issue 4 · Bab 6

Open in Qurani

Primary text

Cheese must be specified by its type and the pasture from which the milk originated. It must also be specified as either fresh (rutab) or dry (yabis).