Charles H. Spurgeon on Psalms 47:9

The shields of the earth belong unto God. There we have the rulers of the earth set forth by a double relation; the one upward, they are scuta Deo, they belong to God; the other downward, they are scuta terae, "the shields of the earth; "and both these noting two things, their dignity and their duty. They belong to God, it is their honour that he hath sealed them: they belong to God, it is their duty to be subject to him. They are shields of the earth, it is their honour that they are above others: they are the shields of the earth, it is their duty to protect others. Edward Reynolds (Bishop).