Narrated Abu Hazim:

I asked Sahl bin Sad, "Did Allah's Apostle ever eat white flour?" Sahl said, "Allah's Apostle never saw white flour since Allah sent him as an Apostle till He took him unto Him." I asked, "Did the people have (use) sieves during the lifetime of Allah's Apostle?" Sahl said, "Allah's Apostle never saw (used) a sieve since Allah sent him as an Apostle until He took him unto Him," I said, "How could you eat barley unsifted?" he said, "We used to grind it and then blow off its husk, and after the husk flew away, we used to prepare the dough (bake) and eat it."

حَدَّثَنَا قُتَيْبَةُ بْنُ سَعِيدٍ، حَدَّثَنَا يَعْقُوبُ، عَنْ أَبِي حَازِمٍ، قَالَ سَأَلْتُ سَهْلَ بْنَ سَعْدٍ فَقُلْتُ هَلْ أَكَلَ رَسُولُ اللَّهِ ﷺ النَّقِيَّ فَقَالَ سَهْلٌ مَا رَأَى رَسُولُ اللَّهِ ﷺ النَّقِيَّ مِنْ حِينَ ابْتَعَثَهُ اللَّهُ حَتَّى قَبَضَهُ اللَّهُ. قَالَ فَقُلْتُ هَلْ كَانَتْ لَكُمْ فِي عَهْدِ رَسُولِ اللَّهِ ﷺ مَنَاخِلُ قَالَ مَا رَأَى رَسُولُ اللَّهِ ﷺ مُنْخُلاً مِنْ حِينَ ابْتَعَثَهُ اللَّهُ حَتَّى قَبَضَهُ. قَالَ قُلْتُ كَيْفَ كُنْتُمْ تَأْكُلُونَ الشَّعِيرَ غَيْرَ مَنْخُولٍ قَالَ كُنَّا نَطْحَنُهُ وَنَنْفُخُهُ، فَيَطِيرُ مَا طَارَ وَمَا بَقِيَ ثَرَّيْنَاهُ فَأَكَلْنَاهُ.