1 Samuel 24:7

Suffered them not to rise against Saul - As he could restrain them, it was his duty to do so; had he connived at their killing him, David would have been the murderer. In praying for the king we call God the only Ruler of princes, for this simple reason, that their authority is the highest among men, and next to that of God himself; hence he alone is above them. We find this sentiment well expressed by an elegant poet: -

Regum timendorum in proprios greges,

Reges in ipsos imperium est Jovis