'Unleavened' in the Bible

Gideon went and prepared a young goat, along with unleavened bread made from an ephah of flour. He put the meat in a basket and the broth in a pot. He brought the food to him under the oak tree and presented it to him.

God's messenger said to him, "Put the meat and unleavened bread on this rock, and pour out the broth." Gideon did as instructed.

The Lord's messenger touched the meat and the unleavened bread with the tip of his staff. Fire flared up from the rock and consumed the meat and unleavened bread. The Lord's messenger then disappeared.