What was the procedure used to prepare barley flour during the era of the Prophet Muhammad (peace be upon him)?
 Narrated Abu Hazim:                     that he asked Sahl, "Did you use white flour during the lifetime of the Prophet ?" Sahl replied, "No. Hazim asked, "Did you use to sift barley flour?" He said, "No, but we used to blow off the husk (of the barley).