Psalms 109:28

Let them curse, but bless thou: when they arise, let them be ashamed; but let thy servant rejoice.

Psalm 109 stands among the cursing psalms that foretell God's retributive wrath and justice against evildoers. It describes tribulation to come upon the enemies of the church. Its words are predictive rather than expressions of personal revenge.

They are God's declaration of what will come upon the wicked, not David asking God to punish his enemies. Though enemies curse, God will bless His servant. When the enemies arise they will be put to shame, while God's servant will rejoice.

The curses fall on those whose lives are evil and who intend to bring such harm on others. When the wicked curse the innocent, God is asked to bless His servant, bring the plotters to shame, and let His servant rejoice. This appeals to divine justice, that those who plot evil against the innocent should receive the consequences of their own wrongdoing.