Sahl bin Sa'd (May Allah be pleased with him) reported:
Messenger of Allah ﷺ had never seen bread made out of fine flour throughout his life, since Allah commissioned him until his death. He was asked, "Did you not have sieves at the time of the Messenger of Allah?" He replied, "Messenger of Allah ﷺ never saw a sieve." He was asked, "How did you manage to eat barley bread made of unsieved flour?" He said, "We used to ground it and then blew away the husk, and what remained we kneaded into dough."

[Al-Bukhari].

وعن سهل بن سعد رضي الله عنه، قال: ما رأى رسول الله ﷺ النقي من حين ابتعثة الله تعالى حتى قبضه الله تعالى، فقيل له: هل كان لكم في عهد رسول الله ﷺ مناخل؟ قال: ما رأى رسول الله ﷺ منخلا من حين ابتعثه الله تعالى حتى قبضه الله تعالى، فقيل له: كيف كنتم تأكلون الشعير غير منخول؟ قال: كنا نطحنه وننفخه، فيطير ما طار، وما بقى ثريناه ((رواه البخاري)).