The king is from the people, and not only and immediately from God: God regulates his people in who can be made king and who cannot, which insinuates that the people have a power to make this man king, and not that man: Deut. 17:14-15. If the people had no power to make a king, then such a law would be a mockery to the people. God's holy law does not regulate a mere nothing, or an unlawful power or action, but rather abolishes and interdicts it. In contrast, God appoints prophets without the consent of the people, but even in the extraordinary circumstances in which He called prophets to anoint certain ones to be kings, they are never actually installed until the people make them kings.
- Samuel Rutherford, Lex, Rex, Question 4 (1644), at http://www.constitution.org/sr/q04.txt.