Yet truly, they shall serve him, so that they may know the difference between my servitude, and the servitude of a kingdom of the lands.
Other versions
King James Version
Nevertheless they shall be his servants; that they may know my service, and the service of the kingdoms of the countries.English Standard Version
Nevertheless, they shall be servants to him, that they may know my service and the service of the kingdoms of the countries."New International Version
They will, however, become subject to him, so that they may learn the difference between serving me and serving the kings of other lands."