So they gave to Jacob all the foreign gods that they had, and the rings that were in their ears. Jacob hid them under the terebinth tree that was near Shechem.
Genesis 35:4

The earrings in this verse were objects of religious veneration, like amulets. Rings in Scripture often represent relationships and/or identification. But why did Jacob bury them under the oak tree? IDK. Oaks in Scripture often represent persons of power and stability, but I don't know if that's related.