Ezekiel 39:1

Therefore, thou son of man, prophesy against Gog
As he had been ordered to do before, and must still continue to do it: behold, I am against thee, O Gog;
which is repeated for the confirmation of it, and to inject terror into him; for terrible it is to have God against any: the chief prince of Meshech and Tubal; (See Gill on Ezekiel 38:2), the Septuagint version adds "Ros" here as there.