Kinds of Bread
Kinds of bread used. Two kinds of bread were in use in the days when Bible events were being enacted: wheat bread, and barley bread. Both of these are in use in Israel today. There is this distinction between them: barley bread is used by the poorer classes, whereas if a family is able to have wheat bread, it is considered to have arrived at a place well up in the comfort scale.8
This same distinction was true in the Old Testament days and also New Testament times. When the "cake of barley bread tumbled into the host of Midian" in the dream of the Midianite soldier (Judges 7:13), it was an indication that the enemy despised Israel, as a more favored people eating wheat bread would despise eaters of barley bread, and yet GOD was to use the despised Israelites of Gideon's army to overpower those proud Midianites.
The lad who had his five barley loaves and gave them to Jesus, and saw Him multiply them to feed five thousand (John 6:9), must have come from the poorer class, but his humble contribution made possible a great miracle, and the crowd was satisfied with that kind of bread.
[Manners And Customs of Bible Lands]