question #3 Sahih Muslim 975, Book 11, Hadith 133 : What is the importance of seeking peace for both the living and the deceased in Islamic tradition?

” Peace be upon the inhabitants of the city (i. e. graveyard).” In the hadith transmitted by Zuhair (the words are):” Peace be upon you, the inhabitants of the city, among the believers, and Muslims, and God willing we shall join you. I beg of Allah peace for us and for you.”