question #2 Sahih Muslim 249b, Book 2, Hadith 52 : What does the concept of joining the deceased imply in Islamic teachings?

The Messenger of Allah (may peace The upon him) went out to the graveyard and said: Peace be upon you, the abode of the believing people. and If Allah so wills we shall join you…. (and so on and so forth) like the hadith narrated by Isma’il b. Ja’far except the words of Malik: Then some persons would be driven away from my Cistern.