I was one of (the first) seven (who had embraced Islam) with Allah's Messenger (ﷺ) and we had nothing to eat then, except the leaves of the Habala or Hubula tree, so that our stool used to be similar to that of sheep. Now the tribe of Bani Asad wants to teach me Islam; I would be a loser and all my efforts would be in vain (if I learn Islam anew from them).
Sahih al-Bukhari Book 70, Hadith 40
← Previous Hadith Once the Prophet (ﷺ) distributed dates among his companions and gave each one seven dates. He gave me seven dates too, one of which was dry and hard, but none of the other dates was more liked by me than that one, for it prolonged my chewing it.

Sahih al-Bukhari Book 70, Hadith 39 Next Hadith → I asked Sahl bin Sa`d, "Did Allah's Messenger (ﷺ) ever eat white flour?" Sahl said, "Allah's Messenger (ﷺ) 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 Messenger (ﷺ)?" Sahl said, "Allah's Messenger (ﷺ) 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."

Sahih al-Bukhari Book 70, Hadith 41