Riyad us Saliheen: Hadith 852

Messenger of Allah (ﷺ) said to me, "This is Jibril (Gabriel) who is conveying you greetings of peace." I responded: "Wa 'Alaihis-Salamu wa Rahmatullahi wa Barakatuhu (may he be safe from evil, and the Mercy of Allah and His Blessings be upon him)."

[Al-Bukhari and Muslim].