David
Psalm 30:9ESV·traditional attribution

“What profit is there in my death, if I go down to the pit? Will the dust praise you? Will it tell of your faithfulness?

John Calvin Reformed @genevareformer

PSALM 30. David having been delivered from great danger, not only renders thanks to God apart by himself, but at the same time invites and exhorts all the pious to perform the same duty. He then confesses that he had flattered himself too confidently in his prosperity, and that his security had justly been chastised. In the third place, having briefly expressed his sorrow, he returns again to thanksgiving.

Commenting on Psalm 30:1-12

C.H. Spurgeon Reformed Baptist @princeofpreachers

In this verse we learn the form and method of David's prayer. It was an argument with God, an urging of reasons, a pleading of his cause. It was not a statement of doctrinal opinions, nor a narration of experience, much less a sly hit at other people under pretence of praying to God, although all these things and worse have been substituted for holy supplication at certain prayer meetings.

Matthew Henry Presbyterian @wholebiblehenry

We have, in these verses, an account of three several states that David was in successively, and of the workings of his heart towards God in each of those states - what he said and did, and how his heart stood affected; in the first of these we may see what we are too apt to be, and in the other two what we should be. I.

Commenting on Psalm 30:6-12