'Unleavened' in the Bible

Then Gideon went in and made ready a young goat, and with an ephah of meal he made unleavened cakes: he put the meat in a basket and the soup in which it had been cooked he put in a pot, and he took it out to him under the oak-tree and gave it to him there.

And the angel of God said to him, Take the meat and the unleavened cakes and put them down on the rock over there, draining out the soup over them. And he did so.