Both - Those who do not fear God, and those who do not fear the king.

The ruin of them both — i.e., the rebels against God and the king.

For their calamity shall rise suddenly And come upon those that fear not God, and rebel against the king and the state, a…

The godly in the land will be quiet in the land. There may be cause to change for the better, but have nothing to do with those who are given to ch…