Sahih al-Bukhari 5410
Book 70: Food, Meals · Narrated by Abu Hazim
Arabic
حَدَّثَنَا سَعِيدُ بْنُ أَبِي مَرْيَمَ، حَدَّثَنَا أَبُو غَسَّانَ، قَالَ حَدَّثَنِي أَبُو حَازِمٍ، أَنَّهُ سَأَلَ سَهْلاً هَلْ رَأَيْتُمْ فِي زَمَانِ النَّبِيِّ صلى الله عليه وسلم النَّقِيَّ قَالَ لاَ. فَقُلْتُ فَهَلْ كُنْتُمْ تَنْخُلُونَ الشَّعِيرَ قَالَ لاَ وَلَكِنْ كُنَّا نَنْفُخُهُ.
English translation
Narrated Abu Hazim:that he asked Sahl, "Did you use white flour during the lifetime of the Prophet (ﷺ) ?" 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)
Reference: Sahih al-Bukhari 5410, Book of Food, Meals. English translation by Dr. Muhammad Muhsin Khan.