This Psalm, like many others, is written from a dual perspective. The Psalmist Asaph speaks first. Then God speaks. God speaks of how He deals with the righteous and the wicked of the Earth. God says, “When I select an appointed time, it is I who judge with equity.”
The wicked will not get away with their wicked deeds. God will judge them fairly, and they will receive retribution. However, God will select the appropriate time to do so. God’s punishment may happen rapidly, or it may be delayed for a time.
If the wicked are not punished rapidly for a wicked deed, they will likely assume that they got away with it. They will most likely continue to do wicked things. As a result, the magnitude of God’s punishment could increase. When God’s punishment finally occurs, they may be destroyed. God may kill them. They will have no time to turn from their wickedness. The Bible says that these people will spend eternity in misery and pain.