John Calvin Commentary Psalms 29:10

"Jehovah sat [as King] at the Flood; Yea, Jehovah sitteth as King for ever." — Psalms 29:10 (ASV)

Jehovah sitteth upon the flood. Some think that David here alludes to that memorable instance of God’s vengeance, when he drowned the world at once by the flood, and thus testified to all ages that he is the judge of mankind. I agree with this in part, but extend his meaning still further.

In my opinion, he pursues the former subject, reminding us that those floods, which still threaten destruction to the earth, are controlled by the providence of God in such a way as to make it evident that it is he alone who governs all things at all times. David, therefore, mentions this among other proofs of God’s power: that even when the elements appear to be mingled and confused together by the utmost fury of the weather, God controls and moderates these commotions from his throne in heaven. He accordingly adds, for the sake of explanation, God sits King for ever.