The judge shall examine all jurors who appear for jury service. If, after all excuses have been allowed, there remain more than twenty-four petit jurors for each judge sitting with a jury who are qualified and not excluded by the terms of section 25-1650, the court may excuse by lot such number in excess of twenty-four as the court may see fit. Those jurors who have been discharged in excess of twenty-four for each judge, but are qualified, shall not be discharged permanently, but shall remain subject to be resummoned for jury service upon the same jury panel.