Psalms 146:10

10.Jehovah shall reign, etc. He directs his discourse to the Church, that he may more effectually persuade all God’s people of their really finding him to be such as he had just described. When he says that God is king for ever, we are to remember at the same time the purpose for which he reigns — taking our definition of it from the preceding ascription’s. It follows that, whether living or dying, we shall be safe under the keeping of a king who reigns expressly for our salvation. Had he said no more than that Jehovah reigned for ever, we would have been ready to object the distance between us and his inconceivable greatness. He states, therefore, in express terms, his being bound by sacred covenant to his chosen people.