David
Psalm 36:2ESV·traditional attribution

For he flatters himself in his own eyes that his iniquity cannot be found out and hated.

John Calvin Reformed @genevareformer

Psalm 36 Almost all interpreters agree in supposing, that in this psalm David in general expresses his wonder and amazement at the goodness of God, because, in the exercise of his favor and mercy, he bears with the wicked, who, notwithstanding, basely contemn him. The opinion which I have formed is somewhat different.

Commenting on Psalm 36:1-12

C.H. Spurgeon Reformed Baptist @princeofpreachers

For. Here is the argument to prove the proposition laid down in the former verse. David here runs over the process of reasoning by which he had become convinced that wicked men have no proper idea of God or respect for him. God fearing men see their sins and bewail them, where the reverse is the case we may be sure there is no fear of God.

Matthew Henry Presbyterian @wholebiblehenry

David, in the title of this psalm, is styled the servant of the Lord; why in this, and not in any other, except in Ps. 18 (title), no reason can be given; but so he was, not only as every good man is God's servant, but as a king, as a prophet, as one employed in serving the interests of God's kingdom among men more...

Commenting on Psalm 36:1-4