It is narrated from Sayyiduna Abu Talhah (may Allah be pleased with him), he says: One day the Messenger of Allah (peace and blessings be upon him and his family) came to us and signs of happiness were visible on his blessed face. We said: O Messenger of Allah! We see joy on your face. The Prophet (peace and blessings be upon him and his family) said: (The reason is that) an angel came to me and said: O Muhammad! Does it not please you that Allah Almighty says: Whoever from your Ummah sends blessings upon you once, I will send ten mercies upon him, and whoever from your Ummah prays for peace upon you once, I will send ten peaces upon him? I said: Why not, I am pleased.