Burying objects with the deceased - what is the source of the practice?

Someone just asked me about the appropriateness of burying objects with the deceased. Below is a description of the Lubavitcher Rebbe's wife being buried with a ring. Similarly Rabbi Shlomo Freifeld was buried with some of the wood of his dining room table as a zechus for the tremendous kiruv work he accomplished at his Shabbos table. Does anyone have a source for the practice?



 From Telushkin, Joseph (2014-06-10). Rebbe: The Life and Teachings of Menachem M. Schneerson, the Most Influential Rabbi in Modern History (Kindle Locations 6683-6687). HarperCollins. Kindle Edition.

Per Chabad custom, no eulogies were delivered. A twenty-member motorcycle police guard escorted the procession from Crown Heights. Also accompanying the Rebbetzin was a ring given to her by her sister Sheina, who was murdered in Treblinka; the Rebbe instructed that the ring be interred with her. The last line on the Rebbetzin’s matzevah (monument), after various honorifics about Chaya Mushka and her parents, mentions her sister, “the righteous Rebbetzin Sheina.