Chapter: What Has Been Related About The Virtue For The Fasting Person When Others Are Eating In His Presence
Laila narrated from the one who freed her (Umm Amarah) that: The Prophet said: When those who are not fasting eat in the presence of the fasting person, the angels send Salat upon him.
Habib bin Zaid said: I heard a freed slave of ours called Laila narrated from [his (Habib's) grandmother] Umm Amarah bint Ka'b Al-Ansar, that the Prophet entered upon her and some food was brought to him. He said: 'Eat.' She said: 'I am fasting.' So the Messenger of Allah said: 'Indeed the angels send Salat upon the fasting person when (others) eat in his presence, until they finish.' And perhaps he said: 'Until they have eaten their fill.'
(Another chain) from Umm Amarah bint Ka'b Al-Ansari: From the Prophet, that is similar, except that he did not mention Until they finish, or they have eating their fill.