Ecclesiastes 8:9 - Matthew Poole's English Annotations on the Holy Bible

All this; all these things before mentioned. Applied my heart unto every work; I have been a diligent observer of all actions and events. There is a time wherein one man ruleth over another; there are some kings who use their power tyrannically and wickedly, whereby they do not only oppress their people, but hurt themselves, by bringing the vengeance of God and men upon their own heads; which is here noted, partly for the terror of tyrants, and partly for the caution and comfort of subjects groaning under those heavy pressures which they are not able to remove, that they may forbear unlawful or rebellious courses, and quietly commit themselves and their cause to God, who judgeth righteously, and who both can and will call the greatest monarchs to a sad account for all their impious and unrighteous courses.