'Aishah (May Allah be pleased with her) reported:
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].
App reference: Book 6, Hadith 8
Arabic/English book reference: Book 6, Hadith 852