Al-Adab al-Mufrad 644
Supplication
Someone who hears mention of the Prophet, may Allah bless him, and doesn't send salah upon him
Jabir ibn 'Abdullah reported that the Prophet, (ﷺ), went up the minbar. When he reached the first step, he said, "Amen". When he ascended to the second step, he said, "Amen," and when he stepped onto the third step, he said, "Amen." They said, "Messenger of Allah, we heard you say 'Amen' three times." He said, "When I went up the first step, Jibril, (ﷺ), came to me and said, 'Wretched is the slave to whom Ramadan comes and when it passes from him is not forgiven.' I said, 'Amen.' Then he said, 'Wretched is the slave who has one or both of his parents alive and they do not let him enter the Garden.' I said, 'Amen.' Then he said, 'Wretched is a slave who does not bless you when you are mentioned in his presence,' and I said, 'Amen.'"