Cheese. In Israel the Arabs are fond of cheese. It is convenient for them to take cheese along with them. Their cheese is somewhat like Western slices, only larger and thicker. They are about as thick as a man's hand. They are found stacked up in the markets.
David's father gave him ten cheeses to take to the army captain (I Samuel 17:18). Also Barzillai brought cheese to King David (II Samuel 17:29).
[Manners And Customs of Bible Lands]