Property comes from work. Read John Locke, for a better definition than I can give. Property **_rights_** come from the golden rule, do to others what you'd have them do to you - aka social contract or God, if you want mental shortcuts.
Discussion
No, not looking for mental shortcuts or any magical solution.
In order to have property rights, you must enforce those rights. Who enforces those rights?
You do. If you don't, they will be violated, and they will be violated most by whoever you trust to protect them.