Augustine of Hippo

"Cease from anger, and forsake wrath." Wherefore art thou wroth? Wherefore is it that, through that passion and indignation, thou dost blaspheme, or almost blaspheme? Against "the man who bringeth wicked devices to pass, cease from anger, and forsake wrath." Knowest thou not whither that wrath tempts thee on? Thou art on the point of saying unto God, that He is unjust. It tends to that. "Look! why is that man prosperous, and this man in adversity?" Consider what thought it begets: stifle the wicked notion. …

Exposition on Psalm 37 ↗

Ambrose of Milan

. If you have overcome the previous passions, anger follows; and therefore Scripture says to you: Cease from anger, and forsake indignation. There are many vices that creep in upon the foolish. Anger is a heavy passion: it often ignites the unwilling; and it drags the willing into madness, so that he may destroy whom he thought to restrain. Stirred up, he often stabs the innocent with a sword. Many have killed friends and brothers out of indignation. Therefore, the wise man says: Anger destroys even the wise (Prov. XV, 1). …

Commentaries on the Twelve Davidic Psalms ↗

Thomas Aquinas

Then when he says, "Cease," he assigns the reason for the aforementioned admonition, and this is twofold. One on the part of the one to whom the admonition is given; another on the part of sinners, at "Yet a little while." Regarding the first, he does two things. …

Exposition on the Psalms of David ↗