David
Psalm 10:7ESV·traditional attribution

His mouth is filled with cursing and deceit and oppression; under his tongue are mischief and iniquity.

John Calvin Reformed @genevareformer

PSALM 10. David here complains, in his own name, and in the name of all the godly, that fraud, extortion, cruelty, violence, and all kind of injustice, prevailed every where in the world; and the cause which he assigns for this is, that ungodly and wicked men, being intoxicated with their prosperity, have shaken off all fear of God, and think they may do whatever they please with impunity.

Commenting on Psalm 10:1-18

C.H. Spurgeon Reformed Baptist @princeofpreachers

Let us now hear the witnesses in court. Let the wretch speak for himself, for out of his own mouth he will be condemned. "His mouth is full of cursing and deceit and fraud." There is not only a little evil there, but his mouth is full of it. A three-headed serpent hath stowed away its coils and venom within the den of its black mouth.

Matthew Henry Presbyterian @wholebiblehenry

David, in these verses, discovers, I. A very great affection to God and his favour; for, in the time of trouble, that which he complains of most feelingly is God's withdrawing his gracious presence (Psa 10:1): "Why standest thou afar off, as one unconcerned in the indignities done to thy name and the injuries done to the people?" Note, God's withdrawings are very grievous to...

Commenting on Psalm 10:1-11