David
Psalm 32:3ESV·traditional attribution

For when I kept silent, my bones wasted away through my groaning all day long.

John Calvin Reformed @genevareformer

PSALM 32. David having largely and painfully experienced what a miserable thing it is to feel God’s hand heavy on account of sin, exclaims that the highest and best part of a happy life consists in this, that God forgives a man’s guilt, and receives him graciously into his favor.

Commenting on Psalm 32:1-11

C.H. Spurgeon Reformed Baptist @princeofpreachers

David now gives us his own experience: no instructor is so efficient as one who testifies to what he has personally known and felt. He writes well who like the spider spins his matter out of his own bowels.

Commenting on Psalm 32:3

C.H. Spurgeon Reformed Baptist @princeofpreachers

When I kept silence. When through neglect I failed to confess, or through despair dared not do so, my bones, those solid pillars of my frame, the stronger portions of my bodily constitution, waxed old, began to decay with weakness, for my grief was so intense as to sap my health and destroy my vital energy. What a killing thing is sin! It is a pestilent disease!