David
Psalm 41:4BSB·traditional attribution

I said, “O LORD, be gracious to me; heal me, for I have sinned against You.”

John Calvin Reformed @genevareformer

PSALM 41 David, while he was severely afflicted by the hand of God, perceived that he was unjustly blamed by men who regarded him as one who had already been condemned and devoted to eternal destruction. Under this trial he fortifies himself by the consolation of hope. At the same time, he complains partly of the cruelty, and partly of the treachery, of his enemies.

Commenting on Psalm 41:1-13

C.H. Spurgeon Reformed Baptist @princeofpreachers

Here we have a controversy between the pleader and his God. He has been a tender friend to the poor, and yet in the hour of his need the promised assistance was not forthcoming. In our Lord's case there was a dark and dreary night in which such arguments were well befitting himself and his condition.

Commenting on Psalm 41:4

C.H. Spurgeon Reformed Baptist @princeofpreachers

I said —said it in earnest prayer— Lord, be merciful unto me. Prove now thy gracious dealings with my soul in adversity, since thou didst aforetime give me grace to act liberally in my prosperity. No appeal is made to justice; the petitioner but hints at the promised reward, but goes straightforward to lay his plea at the feet of mercy.