Jamieson, Fausset and Brown on Ezekiel 21:13

13. it is a trial--rather, "There is a trial" being made: the sword of the Lord will subject all to the ordeal. "What, then, if it contemn even the rod" (scepter of Judah)? Compare as to a similar scourge of unsparing trial, Job 9:23.

it shall be no more--the scepter, that is, the state, must necessarily then come to an end. Fulfilled in part at the overthrow of Judah by Nebuchadnezzar, but fully at the time of "Shiloh's" (Messiah's) coming (Ge 49:10), when Judea became a Roman province.