Takhrij Hadith 418: "I entered upon the Messenger…"

I entered upon the Messenger of Allah ﷺ and found him in joyful spirits and radiant with happiness. I said: “O Messenger of Allah, I have never seen you in more joyful spirits than you are today”. He replied: “And what should prevent me? The angel [Jibril] has just informed me that: whoever sends a single blessing upon you, I [Allah] and My angels send ten blessings upon him; and whoever sends a single greeting of peace upon you, I and My angels send ten greetings of peace upon him”.