Concerning the fasting person when others are eating in his presence
حَدَّثَنَا مُحَمَّدُ بْنُ الْمُصَفَّى، حَدَّثَنَا بَقِيَّةُ، حَدَّثَنَا مُحَمَّدُ بْنُ عَبْدِ الرَّحْمَنِ، عَنْ سُلَيْمَانَ بْنِ بُرَيْدَةَ، عَنْ أَبِيهِ، قَالَ قَالَ رَسُولُ اللَّهِ ـ صلى الله عليه وسلم ـ لِبِلاَلٍ " الْغَدَاءُ يَا بِلاَلُ " . فَقَالَ إِنِّي صَائِمٌ . قَالَ رَسُولُ اللَّهِ ـ صلى الله عليه وسلم ـ " نَأْكُلُ أَرْزَاقَنَا وَفَضْلُ رِزْقِ بِلاَلٍ فِي الْجَنَّةِ أَشَعَرْتَ يَا بِلاَلُ أَنَّ الصَّائِمَ تُسَبِّحُ عِظَامُهُ وَتَسْتَغْفِرُ لَهُ الْمَلاَئِكَةُ مَا أُكِلَ عِنْدَهُ " .
It was narrated from Sulaiman bin Buraidah that his father said: “The Messenger of Allah (ﷺ) said to Bilal: ‘Come and eat, O Bilal.’ He said: ‘I am fasting.’ The Messenger of Allah (ﷺ) said: ‘We are eating our provision, but most of Bilal’s provision is in Paradise. Do you realise, O Bilal, that the bones of the fasting person glorify Allah and the angels pray for forgiveness for him so long as food is eaten in front of him?’”