Habib bin Zayd bin Khallad حبيب بن زيد بن خلاد · The Book on Fasting

The Prophet said: "When those who are not fasting eat in the presence of the fasting person, the angels send Salat upon him."

"I heard a freed slave of ours called Laila narrated from 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.'"

From the Prophet, that is similar, except that he did not mention "Until they finish, or they have eating their fill."