“Bring my soul out of trouble. And of your mercy cut off my enemies,
and destroy all them that afflict my soul, for I am your servant.”
It will be of God’s mercy to destroy the wicked in the Day of Judgment – mercy for the righteous whom the wicked had persecuted. On that day, when the wicked are destroyed, the righteous will greatly rejoice in God’s mercy. As for the wicked, they will not rejoice, for they will feel no mercy whatsoever.