Psalm 139:20

“They speak against you with malicious intent;
your enemies take your name in vain!”

Psalm 139:20

“For they speak against thee wickedly. Why should I bear their company when their talk sickens me? They vent their treasons and blasphemies as often as they please, doing so without the slightest excuse or provocation; let them therefore be gone, where they may find a more congenial associate than I can be. When men speak against God they will be sure to speak against us, if they find it serve their turn; hence godless men are not the stuff out of which true friends can ever be made. God gave these men their tongues, and they turn them against their Benefactor, wickedly, from sheer malice, and with great perverseness.

And thine enemies take thy name in vain. This is their sport: to insult Jehovah’s glorious name is their amusement. To blaspheme the name of the Lord is a gratuitous wickedness in which there can be no pleasure, and from which there can be no profit. This is a sure mark of the “enemies” of the Lord, that they have the impudence to assail his honour, and treat his glory with irreverence. How can God do other than slay them? How can we do other than withdraw from every sort of association with them? What a wonder of sin it is that men should rail against so good a Being as the Lord our God! The impudence of those who talk wickedly is a singular fact, and it is the more singular when we reflect that the Lord against whom they speak is all around them, and lays to heart every dishonour which they render to his holy name. We ought not to wonder that men slander and deride us, for they do the same with the Most High God.”