David
Psalm 51:1BSB·traditional attribution

For the choirmaster. A Psalm of David. When Nathan the prophet came to him after his adultery with Bathsheba. Have mercy on me, O God, according to Your loving devotion; according to Your great compassion, blot out my transgressions.

John Calvin Reformed @genevareformer

PSALM 51 We learn the cause which led to the composition of this psalm from the title appended to it, and which will immediately come under our consideration. For a long period after his melancholy fall, David would seem to have sunk into a spiritual lethargy; but when roused from it by the expostulation of Nathan, he was filled with self-loathing and humiliation in the...

Commenting on Psalm 51:1-19

C.H. Spurgeon Reformed Baptist @princeofpreachers

Have mercy upon me, O God. He appeals at once to the mercy of God, even before he mentions his sin. The sight of mercy is good for eyes that are sore with penitential weeping. Pardon of sin must ever be an act of pure mercy, and therefore to that attribute the awakened sinner flies. "According to thy lovingkindness." Act, O Lord, like thyself; give mercy like thy mercy.

Matthew Henry Presbyterian @wholebiblehenry

The title has reference to a very sad story, that of David's fall. But, though he fell, he was not utterly cast down, for God graciously upheld him and raised him up. 1. The sin which, in this psalm, he laments, was the folly and wickedness he committed with his neighbour's wife, a sin not to be spoken of, nor thought of, without detestation.

Commenting on Psalm 51:1-6