Psalms 109:7

When he shall be judged, let him be condemned. He judged and condemned others in the vilest manner, he suffered not the innocent to escape; and it would be a great shame if in his time of trial, being really guilty, he should be allowed to go free. Who would wish Judge Jeffries to be acquitted if he were tried for perverting justice? Who would desire Nero or Caligula to be cleared if set at the bar for cruelty? When Shylock goes into court, who wishes him to win his suit? And let his prayer become sin.

The condemnation is aggravated when prayer for relief is treated as a sin.

When he shall be judged, let him be condemned. He judged and condemned others in the vilest manner, he suffered not the innocent to escape; and it would be a great shame if in his time of trial, being really guilty, he should be allowed to go free. Who would wish Judge Jeffries to be acquitted if he were tried for perverting justice? Who would desire Nero or Caligula to be cleared if set at the bar for cruelty? When Shylock goes into court, who wishes him to win his suit? And let his prayer become sin. It is sin already, let it be so treated. To the injured it must seem terrible that the black hearted villain should nevertheless pretend to pray, and very naturally do they beg that he may not be heard, but that his pleadings may be regarded as an addition to his guilt. He has devoured the widow's house, and yet he prays. He has put Naboth to death by false accusation and taken possession of his vineyard, and then he presents prayers to the Almighty. He has given up villages to slaughter, and his hands are red with the blood of babes and maidens, and then he pays his vows unto Allah! He must surely be accursed himself who does not wish that such abominable prayers may be loathed of heaven and written down as new sins. He who makes it a sin for others to pray will find his own praying become sin. When he at last sees his need of mercy, mercy herself shall resent his appeal as an insult. "Because that he remembered not to show mercy", he shall himself be forgotten by the God of grace, and his bitter cries for deliverance shall be regarded as mockeries of heaven.

Let him be condemned - יצא רשע yetse rasha. “Let him come out a wicked man;” that is let his wickedness be made manifest. Let his prayer become sin - Thus paraphrased by Calmet: “Let him be accused, convicted, and condemned, and let the defense which he brings for his justification only serve to deepen his guilt, and hasten his condemnation.” I once more apprise the reader, that if these are not the words of David’s enemies against himself, (see on Psa 109:20 (note)), they are prophetic denunciations against a rebellious and apostate person or people, hardened in crime, and refusing to return to God.

When he shall be judged ... - When for his offences he shall be arraigned. The psalmist supposes that he “might” be put on trial; he seems to suppose that this “would be.” Such wickedness could not always escape detection, and sooner or later he would be arrested and brought to trial. “When” this should occur, the psalmist prays that justice might be done; that he might be condemned, as he “ought” to be. Such a prayer could not in itself be wrong, for assuredly it cannot be proper for magistrates to pray that the wicked man may escape, or that they may themselves fail in the very object for which they are appointed. See the General Introduction, 6 (5) e. f. And let his prayer become sin - Evidently his prayer in reference to his “trial” for crime; his prayer that he might be acquitted and discharged. Let it be seen in the result that such a prayer was wrong; that it was, in fact, a prayer for the discharge of a bad man - a man who ought to be punished. Let it be seen to be what a prayer would be if offered for a murderer, or violator of the law - a prayer that he might escape or not be punished. All must see that such a prayer would be wrong, or would be a “sin;” and so, in his own case, it would be equally true that a prayer “for his own escape” would be “sin.” The psalmist asks that, by the result of the trial, such a prayer might be “seen” to be in fact a prayer “for the” protection and escape of a “bad man.” A just sentence in the case would demonstrate this; and this is what the psalmist prays for.