Rasulullah Salallahu Alaihi Wasallam is reported to have said, "Three things follow  the deceased person, of these two 

 return and one remains with him. His family, wealth and deeds follow him, his family and wealth will return, and his actions remain with him.

What is meant by wealth in the above narration? It refers to his slaves and the those things that are necessary for his burial. The author Mazahir-e-Haqq has written that the grave is a box for (good) deeds.