2 Samuel 23:2,3

His word was in my tongue The following words, and consequently the other words and psalms composed and uttered by me upon the like solemn occasions, are not to be looked upon as human inventions, but both the matter and the words of them were suggested by God's Spirit, the great teacher of the church. The Rock of Israel He who is the strength, and defence, and protector of his people; which he manifests by directing kings and rulers so to manage their power, as may most conduce to their comfort and benefit. He that ruleth over men Here are the two principal parts of a king's duty, answerable to the tables of God's law, justice toward men, and piety toward God, both which he is to maintain and promote among his people.