Psalms 30:7

7. By thy favour thou hast made, etc. The judgment of God upon the nation, in sweeping away 70,000 people in two days and threatening the king’s life, taught him that his mountain or government Calvin: “solid support” that on which he firmly trusted was made strong only by divine favour, not by the multitude of his hosts nor his great skill in war. Thus when we listen not to milder methods, God by judgments teaches us our entire dependence on himself. In this verse David “contrasts his former self-confidence, in which he thought himself to be immovable, with the Godward trust he has now gained in the school of affliction.” Delitzsch.

Troubled In the greatest trepidation, terror, and perplexity, as the word denotes. So weak are kings without the favour of God.