question #3 Sahih al-Bukhari 6253, Book 79, Hadith 27 : What is the appropriate response when someone sends greetings of peace in Islamic tradition?

That the Prophet (ﷺ) said to her, “Gabriel sends Salam (greetings) to you.” She replied, “Wa ‘alaihi-s-
Salam Wa Rahmatu-l-lah.” (Peace and Allah’s Mercy be on him).