Charles H. Spurgeon on Psalms 55:19

Even he that abideth of old. The deeds by which God had already showed himself from of old as the righteous King and Judge, the judgments, for example, upon the wicked in the land of Shinar (Ps 55:9), the company of Korah (Ps 55:9,18), the cities of the plain (Ps 55:15), pledge his still ready interposition. He who had already so long held the throne, must now also show himself as King and Judge; he cannot now, at so late a period, be another. E. W. Hengstenberg, 1845.