Hazrat Zaid bin Abi Ayash narrates that I asked Hazrat Sa’d whether peeled white barley can be exchanged for corn. He considered it undesirable and said that the Messenger of Allah (peace be upon him) was asked whether fresh dates can be sold in exchange for dried dates. He asked,“Will the fresh dates decrease in quantity after drying?”The people replied in the affirmative, so he did not consider it permissible.