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?’”

English translation · Sunan Ibn Majah