عَن أبي أَيُّوب قَالَ: كُنَّا عِنْدَ النَّبِيِّ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ فَقُرِّبَ طَعَامٌ فَلَمْ أَرَ طَعَامًا كَانَ أَعْظَمَ بَرَكَةً مِنْهُ أَوَّلَ مَا أَكَلْنَا وَلَا أَقَلَّ بَرَكَةً فِي آخِرِهِ قُلْنَا: يَا رَسُولَ اللَّهِ كَيْفَ هَذَا؟ قَالَ: «إِنَّا ذَكَرْنَا اسْمَ اللَّهِ عَلَيْهِ حِينَ أَكَلْنَا ثُمَّ قَعَدَ مَنْ أَكَلَ وَلَمْ يُسَمِّ اللَّهَ فَأَكَلَ مَعَهُ الشَّيْطَانُ» . رَوَاهُ فِي شرح السّنة

Umm al-Mundhir said

God’s messenger came in to visit me accompanied by ‘Ali when we had some ripening dates hung up. He began to eat, and ‘Ali along with him, but God’s messenger said to ‘Ali, “Stop, Ali, for you are convalescing.” I then prepared some beetroot and barley for them and the Prophet said, “Take some of this, ‘Ali, for it will be more beneficial for you.” Ahmad, Tirmidhi and Ibn Majah transmitted it.