David
Psalm 38:16ESV·traditional attribution

For I said, “Only let them not rejoice over me, who boast against me when my foot slips!”

John Calvin Reformed @genevareformer

PSALM 38 David, suffering under some severe and dangerous malady, as may be conjectured, acknowledges that he is chastened by the Lord, and entreats him to turn away his anger from him. In order the more effectually to induce God to have mercy upon him, he bewails before him the severity of his afflictions in a variety of particulars. These we shall consider separately, and in order.

Commenting on Psalm 38:1-22

C.H. Spurgeon Reformed Baptist @princeofpreachers

For I said, hear me, lest otherwise they should rejoice over me. The good man was not insensible, he dreaded the sharp stings of taunting malice; he feared lest either by his conduct or his condition, he should give occasion to the wicked to triumph. This fear his earnest desires used as an argument in prayer as well as an incentive to prayer.

Matthew Henry Presbyterian @wholebiblehenry

In these verses, I. David complains of the power and malice of his enemies, who, it should seem, not only took occasion from the weakness of his body and the trouble of his mind to insult over him, but took advantage thence to do him a mischief.

Commenting on Psalm 38:12-22