Anas b. Malik reported: Abu Talha ordered Umm Sulaim to prepare a meal specially for Allah's Apostle ﷺ. He then sent me to him (to the Holy Prophet) ;
the rest of the hadith is the same (but there is a slight variation of wording):" Messenger of Allah ﷺ placed his hand and mentioned the name of Allah upon that, and then said: Admit ten men. He (Abu Talha) admitted them and they got in. He (the Holy Prophet) said: Eat while mentioning the name of Allah upon it (the meal). They ate until eighty persons had taken the food. Then Allah's Apostle ﷺ had his meal and so the members of the household, and still they left some food."

وَحَدَّثَنِي عَمْرٌو النَّاقِدُ، حَدَّثَنَا عَبْدُ اللَّهِ بْنُ جَعْفَرٍ الرَّقِّيُّ، حَدَّثَنَا عُبَيْدُ اللَّهِ بْنُ عَمْرٍو، عَنْ عَبْدِ الْمَلِكِ بْنِ عُمَيْرٍ، عَنْ عَبْدِ الرَّحْمَنِ بْنِ أَبِي لَيْلَى، عَنْ أَنَسِ بْنِ مَالِكٍ، قَالَ أَمَرَ أَبُو طَلْحَةَ أُمَّ سُلَيْمٍ أَنْ تَصْنَعَ، لِلنَّبِيِّ ﷺ طَعَامًا لِنَفْسِهِ خَاصَّةً ثُمَّ أَرْسَلَنِي إِلَيْهِ . وَسَاقَ الْحَدِيثَ وَقَالَ فِيهِ فَوَضَعَ النَّبِيُّ ﷺ يَدَهُ وَسَمَّى عَلَيْهِ ثُمَّ قَالَ " ائْذَنْ لِعَشَرَةٍ " . فَأَذِنَ لَهُمْ فَدَخَلُوا فَقَالَ " كُلُوا وَسَمُّوا اللَّهَ " . فَأَكَلُوا حَتَّى فَعَلَ ذَلِكَ بِثَمَانِينَ رَجُلاً . ثُمَّ أَكَلَ النَّبِيُّ ﷺ بَعْدَ ذَلِكَ وَأَهْلُ الْبَيْتِ وَتَرَكُوا سُؤْرًا .