“The bones of Joseph, which the Israelites brought up from Egypt, were buried at Shechem, in the portion of ground that Jacob had bought from the children of Hamor, the father of Shechem, for one hundred pieces of money. It became an inheritance of the descendants of Joseph.”
The bones of Joseph means that Joseph has returned from Egypt. This land was purchased by Jacob according to Genesis, chapter 33. Shechem will become a holy burial place.